var Prototype = {
  Version: '1.6.0.2',

  Browser: {
    IE:     !!(window.attachEvent && !window.opera),
    Opera:  !!window.opera,
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
  },

  BrowserFeatures: {
    XPath: !!document.evaluate,
    ElementExtensions: !!window.HTMLElement,
    SpecificElementExtensions:
      document.createElement('div').__proto__ &&
      document.createElement('div').__proto__ !==
        document.createElement('form').__proto__
  },

  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

  emptyFunction: function() { },
  K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
  Prototype.BrowserFeatures.SpecificElementExtensions = false;


/* Based on Alex Arnell's inheritance implementation. */
var Class = {
  create: function() {
    var parent = null, properties = $A(arguments);
    if (Object.isFunction(properties[0]))
      parent = properties.shift();

    function klass() {
      this.initialize.apply(this, arguments);
    }

    Object.extend(klass, Class.Methods);
    klass.superclass = parent;
    klass.subclasses = [];

    if (parent) {
      var subclass = function() { };
      subclass.prototype = parent.prototype;
      klass.prototype = new subclass;
      parent.subclasses.push(klass);
    }

    for (var i = 0; i < properties.length; i++)
      klass.addMethods(properties[i]);

    if (!klass.prototype.initialize)
      klass.prototype.initialize = Prototype.emptyFunction;

    klass.prototype.constructor = klass;

    return klass;
  }
};

Class.Methods = {
  addMethods: function(source) {
    var ancestor   = this.superclass && this.superclass.prototype;
    var properties = Object.keys(source);

    if (!Object.keys({ toString: true }).length)
      properties.push("toString", "valueOf");

    for (var i = 0, length = properties.length; i < length; i++) {
      var property = properties[i], value = source[property];
      if (ancestor && Object.isFunction(value) &&
          value.argumentNames().first() == "$super") {
        var method = value, value = Object.extend((function(m) {
          return function() { return ancestor[m].apply(this, arguments) };
        })(property).wrap(method), {
          valueOf:  function() { return method },
          toString: function() { return method.toString() }
        });
      }
      this.prototype[property] = value;
    }

    return this;
  }
};

var Abstract = { };

Object.extend = function(destination, source) {
  for (var property in source)
    destination[property] = source[property];
  return destination;
};

Object.extend(Object, {
  inspect: function(object) {
    try {
      if (Object.isUndefined(object)) return 'undefined';
      if (object === null) return 'null';
      return object.inspect ? object.inspect() : String(object);
    } catch (e) {
      if (e instanceof RangeError) return '...';
      throw e;
    }
  },

  toJSON: function(object) {
    var type = typeof object;
    switch (type) {
      case 'undefined':
      case 'function':
      case 'unknown': return;
      case 'boolean': return object.toString();
    }

    if (object === null) return 'null';
    if (object.toJSON) return object.toJSON();
    if (Object.isElement(object)) return;

    var results = [];
    for (var property in object) {
      var value = Object.toJSON(object[property]);
      if (!Object.isUndefined(value))
        results.push(property.toJSON() + ': ' + value);
    }

    return '{' + results.join(', ') + '}';
  },

  toQueryString: function(object) {
    return $H(object).toQueryString();
  },

  toHTML: function(object) {
    return object && object.toHTML ? object.toHTML() : String.interpret(object);
  },

  keys: function(object) {
    var keys = [];
    for (var property in object)
      keys.push(property);
    return keys;
  },

  values: function(object) {
    var values = [];
    for (var property in object)
      values.push(object[property]);
    return values;
  },

  clone: function(object) {
    return Object.extend({ }, object);
  },

  isElement: function(object) {
    return object && object.nodeType == 1;
  },

  isArray: function(object) {
    return object != null && typeof object == "object" &&
      'splice' in object && 'join' in object;
  },

  isHash: function(object) {
    return object instanceof Hash;
  },

  isFunction: function(object) {
    return typeof object == "function";
  },

  isString: function(object) {
    return typeof object == "string";
  },

  isNumber: function(object) {
    return typeof object == "number";
  },

  isUndefined: function(object) {
    return typeof object == "undefined";
  }
});

Object.extend(Function.prototype, {
  argumentNames: function() {
    var names = this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
    return names.length == 1 && !names[0] ? [] : names;
  },

  bind: function() {
    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
    var __method = this, args = $A(arguments), object = args.shift();
    return function() {
      return __method.apply(object, args.concat($A(arguments)));
    }
  },

  bindAsEventListener: function() {
    var __method = this, args = $A(arguments), object = args.shift();
    return function(event) {
      return __method.apply(object, [event || window.event].concat(args));
    }
  },

  curry: function() {
    if (!arguments.length) return this;
    var __method = this, args = $A(arguments);
    return function() {
      return __method.apply(this, args.concat($A(arguments)));
    }
  },

  delay: function() {
    var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
    return window.setTimeout(function() {
      return __method.apply(__method, args);
    }, timeout);
  },

  wrap: function(wrapper) {
    var __method = this;
    return function() {
      return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
    }
  },

  methodize: function() {
    if (this._methodized) return this._methodized;
    var __method = this;
    return this._methodized = function() {
      return __method.apply(null, [this].concat($A(arguments)));
    };
  }
});

Function.prototype.defer = Function.prototype.delay.curry(0.01);

Date.prototype.toJSON = function() {
  return '"' + this.getUTCFullYear() + '-' +
    (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
    this.getUTCDate().toPaddedString(2) + 'T' +
    this.getUTCHours().toPaddedString(2) + ':' +
    this.getUTCMinutes().toPaddedString(2) + ':' +
    this.getUTCSeconds().toPaddedString(2) + 'Z"';
};

var Try = {
  these: function() {
    var returnValue;

    for (var i = 0, length = arguments.length; i < length; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) { }
    }

    return returnValue;
  }
};

RegExp.prototype.match = RegExp.prototype.test;

RegExp.escape = function(str) {
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};

/*--------------------------------------------------------------------------*/

var PeriodicalExecuter = Class.create({
  initialize: function(callback, frequency) {
    this.callback = callback;
    this.frequency = frequency;
    this.currentlyExecuting = false;

    this.registerCallback();
  },

  registerCallback: function() {
    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
  },

  execute: function() {
    this.callback(this);
  },

  stop: function() {
    if (!this.timer) return;
    clearInterval(this.timer);
    this.timer = null;
  },

  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try {
        this.currentlyExecuting = true;
        this.execute();
      } finally {
        this.currentlyExecuting = false;
      }
    }
  }
});
Object.extend(String, {
  interpret: function(value) {
    return value == null ? '' : String(value);
  },
  specialChar: {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r',
    '\\': '\\\\'
  }
});

Object.extend(String.prototype, {
  gsub: function(pattern, replacement) {
    var result = '', source = this, match;
    replacement = arguments.callee.prepareReplacement(replacement);

    while (source.length > 0) {
      if (match = source.match(pattern)) {
        result += source.slice(0, match.index);
        result += String.interpret(replacement(match));
        source  = source.slice(match.index + match[0].length);
      } else {
        result += source, source = '';
      }
    }
    return result;
  },

  sub: function(pattern, replacement, count) {
    replacement = this.gsub.prepareReplacement(replacement);
    count = Object.isUndefined(count) ? 1 : count;

    return this.gsub(pattern, function(match) {
      if (--count < 0) return match[0];
      return replacement(match);
    });
  },

  scan: function(pattern, iterator) {
    this.gsub(pattern, iterator);
    return String(this);
  },

  truncate: function(length, truncation) {
    length = length || 30;
    truncation = Object.isUndefined(truncation) ? '...' : truncation;
    return this.length > length ?
      this.slice(0, length - truncation.length) + truncation : String(this);
  },

  strip: function() {
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
  },

  stripTags: function() {
    return this.replace(/<\/?[^>]+>/gi, '');
  },

  stripScripts: function() {
    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
  },

  extractScripts: function() {
    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
    return (this.match(matchAll) || []).map(function(scriptTag) {
      return (scriptTag.match(matchOne) || ['', ''])[1];
    });
  },

  evalScripts: function() {
    return this.extractScripts().map(function(script) { return eval(script) });
  },

  escapeHTML: function() {
    var self = arguments.callee;
    self.text.data = this;
    return self.div.innerHTML;
  },

  unescapeHTML: function() {
    var div = new Element('div');
    div.innerHTML = this.stripTags();
    return div.childNodes[0] ? (div.childNodes.length > 1 ?
      $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
      div.childNodes[0].nodeValue) : '';
  },

  toQueryParams: function(separator) {
    var match = this.strip().match(/([^?#]*)(#.*)?$/);
    if (!match) return { };

    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
      if ((pair = pair.split('='))[0]) {
        var key = decodeURIComponent(pair.shift());
        var value = pair.length > 1 ? pair.join('=') : pair[0];
        if (value != undefined) value = decodeURIComponent(value);

        if (key in hash) {
          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
          hash[key].push(value);
        }
        else hash[key] = value;
      }
      return hash;
    });
  },

  toArray: function() {
    return this.split('');
  },

  succ: function() {
    return this.slice(0, this.length - 1) +
      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
  },

  times: function(count) {
    return count < 1 ? '' : new Array(count + 1).join(this);
  },

  camelize: function() {
    var parts = this.split('-'), len = parts.length;
    if (len == 1) return parts[0];

    var camelized = this.charAt(0) == '-'
      ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
      : parts[0];

    for (var i = 1; i < len; i++)
      camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);

    return camelized;
  },

  capitalize: function() {
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
  },

  underscore: function() {
    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
  },

  dasherize: function() {
    return this.gsub(/_/,'-');
  },

  inspect: function(useDoubleQuotes) {
    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
      var character = String.specialChar[match[0]];
      return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
    });
    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
  },

  toJSON: function() {
    return this.inspect(true);
  },

  unfilterJSON: function(filter) {
    return this.sub(filter || Prototype.JSONFilter, '#{1}');
  },

  isJSON: function() {
    var str = this;
    if (str.blank()) return false;
    str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
  },

  evalJSON: function(sanitize) {
    var json = this.unfilterJSON();
    try {
      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
    } catch (e) { }
    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
  },

  include: function(pattern) {
    return this.indexOf(pattern) > -1;
  },

  startsWith: function(pattern) {
    return this.indexOf(pattern) === 0;
  },

  endsWith: function(pattern) {
    var d = this.length - pattern.length;
    return d >= 0 && this.lastIndexOf(pattern) === d;
  },

  empty: function() {
    return this == '';
  },

  blank: function() {
    return /^\s*$/.test(this);
  },

  interpolate: function(object, pattern) {
    return new Template(this, pattern).evaluate(object);
  }
});

if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
  escapeHTML: function() {
    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
  },
  unescapeHTML: function() {
    return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
  }
});

String.prototype.gsub.prepareReplacement = function(replacement) {
  if (Object.isFunction(replacement)) return replacement;
  var template = new Template(replacement);
  return function(match) { return template.evaluate(match) };
};

String.prototype.parseQuery = String.prototype.toQueryParams;

Object.extend(String.prototype.escapeHTML, {
  div:  document.createElement('div'),
  text: document.createTextNode('')
});

with (String.prototype.escapeHTML) div.appendChild(text);

var Template = Class.create({
  initialize: function(template, pattern) {
    this.template = template.toString();
    this.pattern = pattern || Template.Pattern;
  },

  evaluate: function(object) {
    if (Object.isFunction(object.toTemplateReplacements))
      object = object.toTemplateReplacements();

    return this.template.gsub(this.pattern, function(match) {
      if (object == null) return '';

      var before = match[1] || '';
      if (before == '\\') return match[2];

      var ctx = object, expr = match[3];
      var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
      match = pattern.exec(expr);
      if (match == null) return before;

      while (match != null) {
        var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
        ctx = ctx[comp];
        if (null == ctx || '' == match[3]) break;
        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
        match = pattern.exec(expr);
      }

      return before + String.interpret(ctx);
    });
  }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

var $break = { };

var Enumerable = {
  each: function(iterator, context) {
    var index = 0;
    iterator = iterator.bind(context);
    try {
      this._each(function(value) {
        iterator(value, index++);
      });
    } catch (e) {
      if (e != $break) throw e;
    }
    return this;
  },

  eachSlice: function(number, iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var index = -number, slices = [], array = this.toArray();
    while ((index += number) < array.length)
      slices.push(array.slice(index, index+number));
    return slices.collect(iterator, context);
  },

  all: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result = true;
    this.each(function(value, index) {
      result = result && !!iterator(value, index);
      if (!result) throw $break;
    });
    return result;
  },

  any: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result = false;
    this.each(function(value, index) {
      if (result = !!iterator(value, index))
        throw $break;
    });
    return result;
  },

  collect: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var results = [];
    this.each(function(value, index) {
      results.push(iterator(value, index));
    });
    return results;
  },

  detect: function(iterator, context) {
    iterator = iterator.bind(context);
    var result;
    this.each(function(value, index) {
      if (iterator(value, index)) {
        result = value;
        throw $break;
      }
    });
    return result;
  },

  findAll: function(iterator, context) {
    iterator = iterator.bind(context);
    var results = [];
    this.each(function(value, index) {
      if (iterator(value, index))
        results.push(value);
    });
    return results;
  },

  grep: function(filter, iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var results = [];

    if (Object.isString(filter))
      filter = new RegExp(filter);

    this.each(function(value, index) {
      if (filter.match(value))
        results.push(iterator(value, index));
    });
    return results;
  },

  include: function(object) {
    if (Object.isFunction(this.indexOf))
      if (this.indexOf(object) != -1) return true;

    var found = false;
    this.each(function(value) {
      if (value == object) {
        found = true;
        throw $break;
      }
    });
    return found;
  },

  inGroupsOf: function(number, fillWith) {
    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
    return this.eachSlice(number, function(slice) {
      while(slice.length < number) slice.push(fillWith);
      return slice;
    });
  },

  inject: function(memo, iterator, context) {
    iterator = iterator.bind(context);
    this.each(function(value, index) {
      memo = iterator(memo, value, index);
    });
    return memo;
  },

  invoke: function(method) {
    var args = $A(arguments).slice(1);
    return this.map(function(value) {
      return value[method].apply(value, args);
    });
  },

  max: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator(value, index);
      if (result == null || value >= result)
        result = value;
    });
    return result;
  },

  min: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator(value, index);
      if (result == null || value < result)
        result = value;
    });
    return result;
  },

  partition: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var trues = [], falses = [];
    this.each(function(value, index) {
      (iterator(value, index) ?
        trues : falses).push(value);
    });
    return [trues, falses];
  },

  pluck: function(property) {
    var results = [];
    this.each(function(value) {
      results.push(value[property]);
    });
    return results;
  },

  reject: function(iterator, context) {
    iterator = iterator.bind(context);
    var results = [];
    this.each(function(value, index) {
      if (!iterator(value, index))
        results.push(value);
    });
    return results;
  },

  sortBy: function(iterator, context) {
    iterator = iterator.bind(context);
    return this.map(function(value, index) {
      return {value: value, criteria: iterator(value, index)};
    }).sort(function(left, right) {
      var a = left.criteria, b = right.criteria;
      return a < b ? -1 : a > b ? 1 : 0;
    }).pluck('value');
  },

  toArray: function() {
    return this.map();
  },

  zip: function() {
    var iterator = Prototype.K, args = $A(arguments);
    if (Object.isFunction(args.last()))
      iterator = args.pop();

    var collections = [this].concat(args).map($A);
    return this.map(function(value, index) {
      return iterator(collections.pluck(index));
    });
  },

  size: function() {
    return this.toArray().length;
  },

  inspect: function() {
    return '#<Enumerable:' + this.toArray().inspect() + '>';
  }
};

Object.extend(Enumerable, {
  map:     Enumerable.collect,
  find:    Enumerable.detect,
  select:  Enumerable.findAll,
  filter:  Enumerable.findAll,
  member:  Enumerable.include,
  entries: Enumerable.toArray,
  every:   Enumerable.all,
  some:    Enumerable.any
});
function $A(iterable) {
  if (!iterable) return [];
  if (iterable.toArray) return iterable.toArray();
  var length = iterable.length || 0, results = new Array(length);
  while (length--) results[length] = iterable[length];
  return results;
}

if (Prototype.Browser.WebKit) {
  $A = function(iterable) {
    if (!iterable) return [];
    if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
        iterable.toArray) return iterable.toArray();
    var length = iterable.length || 0, results = new Array(length);
    while (length--) results[length] = iterable[length];
    return results;
  };
}

Array.from = $A;

Object.extend(Array.prototype, Enumerable);

if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, {
  _each: function(iterator) {
    for (var i = 0, length = this.length; i < length; i++)
      iterator(this[i]);
  },

  clear: function() {
    this.length = 0;
    return this;
  },

  first: function() {
    return this[0];
  },

  last: function() {
    return this[this.length - 1];
  },

  compact: function() {
    return this.select(function(value) {
      return value != null;
    });
  },

  flatten: function() {
    return this.inject([], function(array, value) {
      return array.concat(Object.isArray(value) ?
        value.flatten() : [value]);
    });
  },

  without: function() {
    var values = $A(arguments);
    return this.select(function(value) {
      return !values.include(value);
    });
  },

  reverse: function(inline) {
    return (inline !== false ? this : this.toArray())._reverse();
  },

  reduce: function() {
    return this.length > 1 ? this : this[0];
  },

  uniq: function(sorted) {
    return this.inject([], function(array, value, index) {
      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
        array.push(value);
      return array;
    });
  },

  intersect: function(array) {
    return this.uniq().findAll(function(item) {
      return array.detect(function(value) { return item === value });
    });
  },

  clone: function() {
    return [].concat(this);
  },

  size: function() {
    return this.length;
  },

  inspect: function() {
    return '[' + this.map(Object.inspect).join(', ') + ']';
  },

  toJSON: function() {
    var results = [];
    this.each(function(object) {
      var value = Object.toJSON(object);
      if (!Object.isUndefined(value)) results.push(value);
    });
    return '[' + results.join(', ') + ']';
  }
});

// use native browser JS 1.6 implementation if available
if (Object.isFunction(Array.prototype.forEach))
  Array.prototype._each = Array.prototype.forEach;

if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
  i || (i = 0);
  var length = this.length;
  if (i < 0) i = length + i;
  for (; i < length; i++)
    if (this[i] === item) return i;
  return -1;
};

if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
  i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
  var n = this.slice(0, i).reverse().indexOf(item);
  return (n < 0) ? n : i - n - 1;
};

Array.prototype.toArray = Array.prototype.clone;

function $w(string) {
  if (!Object.isString(string)) return [];
  string = string.strip();
  return string ? string.split(/\s+/) : [];
}

if (Prototype.Browser.Opera){
  Array.prototype.concat = function() {
    var array = [];
    for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
    for (var i = 0, length = arguments.length; i < length; i++) {
      if (Object.isArray(arguments[i])) {
        for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
          array.push(arguments[i][j]);
      } else {
        array.push(arguments[i]);
      }
    }
    return array;
  };
}
Object.extend(Number.prototype, {
  toColorPart: function() {
    return this.toPaddedString(2, 16);
  },

  succ: function() {
    return this + 1;
  },

  times: function(iterator) {
    $R(0, this, true).each(iterator);
    return this;
  },

  toPaddedString: function(length, radix) {
    var string = this.toString(radix || 10);
    return '0'.times(length - string.length) + string;
  },

  toJSON: function() {
    return isFinite(this) ? this.toString() : 'null';
  }
});

$w('abs round ceil floor').each(function(method){
  Number.prototype[method] = Math[method].methodize();
});
function $H(object) {
  return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {

  function toQueryPair(key, value) {
    if (Object.isUndefined(value)) return key;
    return key + '=' + encodeURIComponent(String.interpret(value));
  }

  return {
    initialize: function(object) {
      this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
    },

    _each: function(iterator) {
      for (var key in this._object) {
        var value = this._object[key], pair = [key, value];
        pair.key = key;
        pair.value = value;
        iterator(pair);
      }
    },

    set: function(key, value) {
      return this._object[key] = value;
    },

    get: function(key) {
      return this._object[key];
    },

    unset: function(key) {
      var value = this._object[key];
      delete this._object[key];
      return value;
    },

    toObject: function() {
      return Object.clone(this._object);
    },

    keys: function() {
      return this.pluck('key');
    },

    values: function() {
      return this.pluck('value');
    },

    index: function(value) {
      var match = this.detect(function(pair) {
        return pair.value === value;
      });
      return match && match.key;
    },

    merge: function(object) {
      return this.clone().update(object);
    },

    update: function(object) {
      return new Hash(object).inject(this, function(result, pair) {
        result.set(pair.key, pair.value);
        return result;
      });
    },

    toQueryString: function() {
      return this.map(function(pair) {
        var key = encodeURIComponent(pair.key), values = pair.value;

        if (values && typeof values == 'object') {
          if (Object.isArray(values))
            return values.map(toQueryPair.curry(key)).join('&');
        }
        return toQueryPair(key, values);
      }).join('&');
    },

    inspect: function() {
      return '#<Hash:{' + this.map(function(pair) {
        return pair.map(Object.inspect).join(': ');
      }).join(', ') + '}>';
    },

    toJSON: function() {
      return Object.toJSON(this.toObject());
    },

    clone: function() {
      return new Hash(this);
    }
  }
})());

Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
Hash.from = $H;
var ObjectRange = Class.create(Enumerable, {
  initialize: function(start, end, exclusive) {
    this.start = start;
    this.end = end;
    this.exclusive = exclusive;
  },

  _each: function(iterator) {
    var value = this.start;
    while (this.include(value)) {
      iterator(value);
      value = value.succ();
    }
  },

  include: function(value) {
    if (value < this.start)
      return false;
    if (this.exclusive)
      return value < this.end;
    return value <= this.end;
  }
});

var $R = function(start, end, exclusive) {
  return new ObjectRange(start, end, exclusive);
};

var Ajax = {
  getTransport: function() {
    return Try.these(
      function() {return new XMLHttpRequest()},
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
    ) || false;
  },

  activeRequestCount: 0
};

Ajax.Responders = {
  responders: [],

  _each: function(iterator) {
    this.responders._each(iterator);
  },

  register: function(responder) {
    if (!this.include(responder))
      this.responders.push(responder);
  },

  unregister: function(responder) {
    this.responders = this.responders.without(responder);
  },

  dispatch: function(callback, request, transport, json) {
    this.each(function(responder) {
      if (Object.isFunction(responder[callback])) {
        try {
          responder[callback].apply(responder, [request, transport, json]);
        } catch (e) { }
      }
    });
  }
};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({
  onCreate:   function() { Ajax.activeRequestCount++ },
  onComplete: function() { Ajax.activeRequestCount-- }
});

Ajax.Base = Class.create({
  initialize: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      contentType:  'application/x-www-form-urlencoded',
      encoding:     'UTF-8',
      parameters:   '',
      evalJSON:     true,
      evalJS:       true
    };
    Object.extend(this.options, options || { });

    this.options.method = this.options.method.toLowerCase();

    if (Object.isString(this.options.parameters))
      this.options.parameters = this.options.parameters.toQueryParams();
    else if (Object.isHash(this.options.parameters))
      this.options.parameters = this.options.parameters.toObject();
  }
});

Ajax.Request = Class.create(Ajax.Base, {
  _complete: false,

  initialize: function($super, url, options) {
    $super(options);
    this.transport = Ajax.getTransport();
    this.request(url);
  },

  request: function(url) {
    this.url = url;
    this.method = this.options.method;
    var params = Object.clone(this.options.parameters);

    if (!['get', 'post'].include(this.method)) {
      // simulate other verbs over post
      params['_method'] = this.method;
      this.method = 'post';
    }

    this.parameters = params;

    if (params = Object.toQueryString(params)) {
      // when GET, append parameters to URL
      if (this.method == 'get')
        this.url += (this.url.include('?') ? '&' : '?') + params;
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
        params += '&_=';
    }

    try {
      var response = new Ajax.Response(this);
      if (this.options.onCreate) this.options.onCreate(response);
      Ajax.Responders.dispatch('onCreate', this, response);

      this.transport.open(this.method.toUpperCase(), this.url,
        this.options.asynchronous);

      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

      this.transport.onreadystatechange = this.onStateChange.bind(this);
      this.setRequestHeaders();

      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
      this.transport.send(this.body);

      /* Force Firefox to handle ready state 4 for synchronous requests */
      if (!this.options.asynchronous && this.transport.overrideMimeType)
        this.onStateChange();

    }
    catch (e) {
      this.dispatchException(e);
    }
  },

  onStateChange: function() {
    var readyState = this.transport.readyState;
    if (readyState > 1 && !((readyState == 4) && this._complete))
      this.respondToReadyState(this.transport.readyState);
  },

  setRequestHeaders: function() {
    var headers = {
      'X-Requested-With': 'XMLHttpRequest',
      'X-Prototype-Version': Prototype.Version,
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
    };

    if (this.method == 'post') {
      headers['Content-type'] = this.options.contentType +
        (this.options.encoding ? '; charset=' + this.options.encoding : '');

      /* Force "Connection: close" for older Mozilla browsers to work
       * around a bug where XMLHttpRequest sends an incorrect
       * Content-length header. See Mozilla Bugzilla #246651.
       */
      if (this.transport.overrideMimeType &&
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
            headers['Connection'] = 'close';
    }

    // user-defined headers
    if (typeof this.options.requestHeaders == 'object') {
      var extras = this.options.requestHeaders;

      if (Object.isFunction(extras.push))
        for (var i = 0, length = extras.length; i < length; i += 2)
          headers[extras[i]] = extras[i+1];
      else
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
    }

    for (var name in headers)
      this.transport.setRequestHeader(name, headers[name]);
  },

  success: function() {
    var status = this.getStatus();
    return !status || (status >= 200 && status < 300);
  },

  getStatus: function() {
    try {
      return this.transport.status || 0;
    } catch (e) { return 0 }
  },

  respondToReadyState: function(readyState) {
    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

    if (state == 'Complete') {
      try {
        this._complete = true;
        (this.options['on' + response.status]
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
         || Prototype.emptyFunction)(response, response.headerJSON);
      } catch (e) {
        this.dispatchException(e);
      }

      var contentType = response.getHeader('Content-type');
      if (this.options.evalJS == 'force'
          || (this.options.evalJS && this.isSameOrigin() && contentType
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
        this.evalResponse();
    }

    try {
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
    } catch (e) {
      this.dispatchException(e);
    }

    if (state == 'Complete') {
      // avoid memory leak in MSIE: clean up
      this.transport.onreadystatechange = Prototype.emptyFunction;
    }
  },

  isSameOrigin: function() {
    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
      protocol: location.protocol,
      domain: document.domain,
      port: location.port ? ':' + location.port : ''
    }));
  },

  getHeader: function(name) {
    try {
      return this.transport.getResponseHeader(name) || null;
    } catch (e) { return null }
  },

  evalResponse: function() {
    try {
      return eval((this.transport.responseText || '').unfilterJSON());
    } catch (e) {
      this.dispatchException(e);
    }
  },

  dispatchException: function(exception) {
    (this.options.onException || Prototype.emptyFunction)(this, exception);
    Ajax.Responders.dispatch('onException', this, exception);
  }
});

Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Response = Class.create({
  initialize: function(request){
    this.request = request;
    var transport  = this.transport  = request.transport,
        readyState = this.readyState = transport.readyState;

    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
      this.status       = this.getStatus();
      this.statusText   = this.getStatusText();
      this.responseText = String.interpret(transport.responseText);
      this.headerJSON   = this._getHeaderJSON();
    }

    if(readyState == 4) {
      var xml = transport.responseXML;
      this.responseXML  = Object.isUndefined(xml) ? null : xml;
      this.responseJSON = this._getResponseJSON();
    }
  },

  status:      0,
  statusText: '',

  getStatus: Ajax.Request.prototype.getStatus,

  getStatusText: function() {
    try {
      return this.transport.statusText || '';
    } catch (e) { return '' }
  },

  getHeader: Ajax.Request.prototype.getHeader,

  getAllHeaders: function() {
    try {
      return this.getAllResponseHeaders();
    } catch (e) { return null }
  },

  getResponseHeader: function(name) {
    return this.transport.getResponseHeader(name);
  },

  getAllResponseHeaders: function() {
    return this.transport.getAllResponseHeaders();
  },

  _getHeaderJSON: function() {
    var json = this.getHeader('X-JSON');
    if (!json) return null;
    json = decodeURIComponent(escape(json));
    try {
      return json.evalJSON(this.request.options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  },

  _getResponseJSON: function() {
    var options = this.request.options;
    if (!options.evalJSON || (options.evalJSON != 'force' &&
      !(this.getHeader('Content-type') || '').include('application/json')) ||
        this.responseText.blank())
          return null;
    try {
      return this.responseText.evalJSON(options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  }
});

Ajax.Updater = Class.create(Ajax.Request, {
  initialize: function($super, container, url, options) {
    this.container = {
      success: (container.success || container),
      failure: (container.failure || (container.success ? null : container))
    };

    options = Object.clone(options);
    var onComplete = options.onComplete;
    options.onComplete = (function(response, json) {
      this.updateContent(response.responseText);
      if (Object.isFunction(onComplete)) onComplete(response, json);
    }).bind(this);

    $super(url, options);
  },

  updateContent: function(responseText) {
    var receiver = this.container[this.success() ? 'success' : 'failure'],
        options = this.options;

    if (!options.evalScripts) responseText = responseText.stripScripts();

    if (receiver = $(receiver)) {
      if (options.insertion) {
        if (Object.isString(options.insertion)) {
          var insertion = { }; insertion[options.insertion] = responseText;
          receiver.insert(insertion);
        }
        else options.insertion(receiver, responseText);
      }
      else receiver.update(responseText);
    }
  }
});

Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
  initialize: function($super, container, url, options) {
    $super(options);
    this.onComplete = this.options.onComplete;

    this.frequency = (this.options.frequency || 2);
    this.decay = (this.options.decay || 1);

    this.updater = { };
    this.container = container;
    this.url = url;

    this.start();
  },

  start: function() {
    this.options.onComplete = this.updateComplete.bind(this);
    this.onTimerEvent();
  },

  stop: function() {
    this.updater.options.onComplete = undefined;
    clearTimeout(this.timer);
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

  updateComplete: function(response) {
    if (this.options.decay) {
      this.decay = (response.responseText == this.lastText ?
        this.decay * this.options.decay : 1);

      this.lastText = response.responseText;
    }
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
  },

  onTimerEvent: function() {
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
  }
});
function $(element) {
  if (arguments.length > 1) {
    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
      elements.push($(arguments[i]));
    return elements;
  }
  if (Object.isString(element))
    element = document.getElementById(element);
  return Element.extend(element);
}

if (Prototype.BrowserFeatures.XPath) {
  document._getElementsByXPath = function(expression, parentElement) {
    var results = [];
    var query = document.evaluate(expression, $(parentElement) || document,
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    for (var i = 0, length = query.snapshotLength; i < length; i++)
      results.push(Element.extend(query.snapshotItem(i)));
    return results;
  };
}

/*--------------------------------------------------------------------------*/

if (!window.Node) var Node = { };

if (!Node.ELEMENT_NODE) {
  // DOM level 2 ECMAScript Language Binding
  Object.extend(Node, {
    ELEMENT_NODE: 1,
    ATTRIBUTE_NODE: 2,
    TEXT_NODE: 3,
    CDATA_SECTION_NODE: 4,
    ENTITY_REFERENCE_NODE: 5,
    ENTITY_NODE: 6,
    PROCESSING_INSTRUCTION_NODE: 7,
    COMMENT_NODE: 8,
    DOCUMENT_NODE: 9,
    DOCUMENT_TYPE_NODE: 10,
    DOCUMENT_FRAGMENT_NODE: 11,
    NOTATION_NODE: 12
  });
}

(function() {
  var element = this.Element;
  this.Element = function(tagName, attributes) {
    attributes = attributes || { };
    tagName = tagName.toLowerCase();
    var cache = Element.cache;
    if (Prototype.Browser.IE && attributes.name) {
      tagName = '<' + tagName + ' name="' + attributes.name + '">';
      delete attributes.name;
      return Element.writeAttribute(document.createElement(tagName), attributes);
    }
    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
    return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
  };
  Object.extend(this.Element, element || { });
}).call(window);

Element.cache = { };

Element.Methods = {
  visible: function(element) {
    return $(element).style.display != 'none';
  },

  toggle: function(element) {
    element = $(element);
    Element[Element.visible(element) ? 'hide' : 'show'](element);
    return element;
  },

  hide: function(element) {
    $(element).style.display = 'none';
    return element;
  },

  show: function(element) {
    $(element).style.display = '';
    return element;
  },

  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
    return element;
  },

  update: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);
    content = Object.toHTML(content);
    element.innerHTML = content.stripScripts();
    content.evalScripts.bind(content).defer();
    return element;
  },

  replace: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    else if (!Object.isElement(content)) {
      content = Object.toHTML(content);
      var range = element.ownerDocument.createRange();
      range.selectNode(element);
      content.evalScripts.bind(content).defer();
      content = range.createContextualFragment(content.stripScripts());
    }
    element.parentNode.replaceChild(content, element);
    return element;
  },

  insert: function(element, insertions) {
    element = $(element);

    if (Object.isString(insertions) || Object.isNumber(insertions) ||
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
          insertions = {bottom:insertions};

    var content, insert, tagName, childNodes;

    for (var position in insertions) {
      content  = insertions[position];
      position = position.toLowerCase();
      insert = Element._insertionTranslations[position];

      if (content && content.toElement) content = content.toElement();
      if (Object.isElement(content)) {
        insert(element, content);
        continue;
      }

      content = Object.toHTML(content);

      tagName = ((position == 'before' || position == 'after')
        ? element.parentNode : element).tagName.toUpperCase();

      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

      if (position == 'top' || position == 'after') childNodes.reverse();
      childNodes.each(insert.curry(element));

      content.evalScripts.bind(content).defer();
    }

    return element;
  },

  wrap: function(element, wrapper, attributes) {
    element = $(element);
    if (Object.isElement(wrapper))
      $(wrapper).writeAttribute(attributes || { });
    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
    else wrapper = new Element('div', wrapper);
    if (element.parentNode)
      element.parentNode.replaceChild(wrapper, element);
    wrapper.appendChild(element);
    return wrapper;
  },

  inspect: function(element) {
    element = $(element);
    var result = '<' + element.tagName.toLowerCase();
    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
      var property = pair.first(), attribute = pair.last();
      var value = (element[property] || '').toString();
      if (value) result += ' ' + attribute + '=' + value.inspect(true);
    });
    return result + '>';
  },

  recursivelyCollect: function(element, property) {
    element = $(element);
    var elements = [];
    while (element = element[property])
      if (element.nodeType == 1)
        elements.push(Element.extend(element));
    return elements;
  },

  ancestors: function(element) {
    return $(element).recursivelyCollect('parentNode');
  },

  descendants: function(element) {
    return $(element).select("*");
  },

  firstDescendant: function(element) {
    element = $(element).firstChild;
    while (element && element.nodeType != 1) element = element.nextSibling;
    return $(element);
  },

  immediateDescendants: function(element) {
    if (!(element = $(element).firstChild)) return [];
    while (element && element.nodeType != 1) element = element.nextSibling;
    if (element) return [element].concat($(element).nextSiblings());
    return [];
  },

  previousSiblings: function(element) {
    return $(element).recursivelyCollect('previousSibling');
  },

  nextSiblings: function(element) {
    return $(element).recursivelyCollect('nextSibling');
  },

  siblings: function(element) {
    element = $(element);
    return element.previousSiblings().reverse().concat(element.nextSiblings());
  },

  match: function(element, selector) {
    if (Object.isString(selector))
      selector = new Selector(selector);
    return selector.match($(element));
  },

  up: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(element.parentNode);
    var ancestors = element.ancestors();
    return Object.isNumber(expression) ? ancestors[expression] :
      Selector.findElement(ancestors, expression, index);
  },

  down: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return element.firstDescendant();
    return Object.isNumber(expression) ? element.descendants()[expression] :
      element.select(expression)[index || 0];
  },

  previous: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
    var previousSiblings = element.previousSiblings();
    return Object.isNumber(expression) ? previousSiblings[expression] :
      Selector.findElement(previousSiblings, expression, index);
  },

  next: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
    var nextSiblings = element.nextSiblings();
    return Object.isNumber(expression) ? nextSiblings[expression] :
      Selector.findElement(nextSiblings, expression, index);
  },

  select: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element, args);
  },

  adjacent: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element.parentNode, args).without(element);
  },

  identify: function(element) {
    element = $(element);
    var id = element.readAttribute('id'), self = arguments.callee;
    if (id) return id;
    do { id = 'anonymous_element_' + self.counter++ } while ($(id));
    element.writeAttribute('id', id);
    return id;
  },

  readAttribute: function(element, name) {
    element = $(element);
    if (Prototype.Browser.IE) {
      var t = Element._attributeTranslations.read;
      if (t.values[name]) return t.values[name](element, name);
      if (t.names[name]) name = t.names[name];
      if (name.include(':')) {
        return (!element.attributes || !element.attributes[name]) ? null :
         element.attributes[name].value;
      }
    }
    return element.getAttribute(name);
  },

  writeAttribute: function(element, name, value) {
    element = $(element);
    var attributes = { }, t = Element._attributeTranslations.write;

    if (typeof name == 'object') attributes = name;
    else attributes[name] = Object.isUndefined(value) ? true : value;

    for (var attr in attributes) {
      name = t.names[attr] || attr;
      value = attributes[attr];
      if (t.values[attr]) name = t.values[attr](element, value);
      if (value === false || value === null)
        element.removeAttribute(name);
      else if (value === true)
        element.setAttribute(name, name);
      else element.setAttribute(name, value);
    }
    return element;
  },

  getHeight: function(element) {
    return $(element).getDimensions().height;
  },

  getWidth: function(element) {
    return $(element).getDimensions().width;
  },

  classNames: function(element) {
    return new Element.ClassNames(element);
  },

  hasClassName: function(element, className) {
    if (!(element = $(element))) return;
    var elementClassName = element.className;
    return (elementClassName.length > 0 && (elementClassName == className ||
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
  },

  addClassName: function(element, className) {
    if (!(element = $(element))) return;
    if (!element.hasClassName(className))
      element.className += (element.className ? ' ' : '') + className;
    return element;
  },

  removeClassName: function(element, className) {
    if (!(element = $(element))) return;
    element.className = element.className.replace(
      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
    return element;
  },

  toggleClassName: function(element, className) {
    if (!(element = $(element))) return;
    return element[element.hasClassName(className) ?
      'removeClassName' : 'addClassName'](className);
  },

  // removes whitespace-only text node children
  cleanWhitespace: function(element) {
    element = $(element);
    var node = element.firstChild;
    while (node) {
      var nextNode = node.nextSibling;
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
        element.removeChild(node);
      node = nextNode;
    }
    return element;
  },

  empty: function(element) {
    return $(element).innerHTML.blank();
  },

  descendantOf: function(element, ancestor) {
    element = $(element), ancestor = $(ancestor);
    var originalAncestor = ancestor;

    if (element.compareDocumentPosition)
      return (element.compareDocumentPosition(ancestor) & 8) === 8;

    if (element.sourceIndex && !Prototype.Browser.Opera) {
      var e = element.sourceIndex, a = ancestor.sourceIndex,
       nextAncestor = ancestor.nextSibling;
      if (!nextAncestor) {
        do { ancestor = ancestor.parentNode; }
        while (!(nextAncestor = ancestor.nextSibling) && ancestor.parentNode);
      }
      if (nextAncestor && nextAncestor.sourceIndex)
       return (e > a && e < nextAncestor.sourceIndex);
    }

    while (element = element.parentNode)
      if (element == originalAncestor) return true;
    return false;
  },

  scrollTo: function(element) {
    element = $(element);
    var pos = element.cumulativeOffset();
    window.scrollTo(pos[0], pos[1]);
    return element;
  },

  getStyle: function(element, style) {
    element = $(element);
    style = style == 'float' ? 'cssFloat' : style.camelize();
    var value = element.style[style];
    if (!value) {
      var css = document.defaultView.getComputedStyle(element, null);
      value = css ? css[style] : null;
    }
    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
    return value == 'auto' ? null : value;
  },

  getOpacity: function(element) {
    return $(element).getStyle('opacity');
  },

  setStyle: function(element, styles) {
    element = $(element);
    var elementStyle = element.style, match;
    if (Object.isString(styles)) {
      element.style.cssText += ';' + styles;
      return styles.include('opacity') ?
        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
    }
    for (var property in styles)
      if (property == 'opacity') element.setOpacity(styles[property]);
      else
        elementStyle[(property == 'float' || property == 'cssFloat') ?
          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
            property] = styles[property];

    return element;
  },

  setOpacity: function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;
    return element;
  },

  getDimensions: function(element) {
    element = $(element);
    var display = $(element).getStyle('display');
    if (display != 'none' && display != null) // Safari bug
      return {width: element.offsetWidth, height: element.offsetHeight};

    // All *Width and *Height properties give 0 on elements with display none,
    // so enable the element temporarily
    var els = element.style;
    var originalVisibility = els.visibility;
    var originalPosition = els.position;
    var originalDisplay = els.display;
    els.visibility = 'hidden';
    els.position = 'absolute';
    els.display = 'block';
    var originalWidth = element.clientWidth;
    var originalHeight = element.clientHeight;
    els.display = originalDisplay;
    els.position = originalPosition;
    els.visibility = originalVisibility;
    return {width: originalWidth, height: originalHeight};
  },

  makePositioned: function(element) {
    element = $(element);
    var pos = Element.getStyle(element, 'position');
    if (pos == 'static' || !pos) {
      element._madePositioned = true;
      element.style.position = 'relative';
      // Opera returns the offset relative to the positioning context, when an
      // element is position relative but top and left have not been defined
      if (window.opera) {
        element.style.top = 0;
        element.style.left = 0;
      }
    }
    return element;
  },

  undoPositioned: function(element) {
    element = $(element);
    if (element._madePositioned) {
      element._madePositioned = undefined;
      element.style.position =
        element.style.top =
        element.style.left =
        element.style.bottom =
        element.style.right = '';
    }
    return element;
  },

  makeClipping: function(element) {
    element = $(element);
    if (element._overflow) return element;
    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
    if (element._overflow !== 'hidden')
      element.style.overflow = 'hidden';
    return element;
  },

  undoClipping: function(element) {
    element = $(element);
    if (!element._overflow) return element;
    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
    element._overflow = null;
    return element;
  },

  cumulativeOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  positionedOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
      if (element) {
        if (element.tagName == 'BODY') break;
        var p = Element.getStyle(element, 'position');
        if (p !== 'static') break;
      }
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  absolutize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'absolute') return;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    var offsets = element.positionedOffset();
    var top     = offsets[1];
    var left    = offsets[0];
    var width   = element.clientWidth;
    var height  = element.clientHeight;

    element._originalLeft   = left - parseFloat(element.style.left  || 0);
    element._originalTop    = top  - parseFloat(element.style.top || 0);
    element._originalWidth  = element.style.width;
    element._originalHeight = element.style.height;

    element.style.position = 'absolute';
    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.width  = width + 'px';
    element.style.height = height + 'px';
    return element;
  },

  relativize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'relative') return;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    element.style.position = 'relative';
    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);

    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.height = element._originalHeight;
    element.style.width  = element._originalWidth;
    return element;
  },

  cumulativeScrollOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.scrollTop  || 0;
      valueL += element.scrollLeft || 0;
      element = element.parentNode;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  getOffsetParent: function(element) {
    if (element.offsetParent) return $(element.offsetParent);
    if (element == document.body) return $(element);

    while ((element = element.parentNode) && element != document.body)
      if (Element.getStyle(element, 'position') != 'static')
        return $(element);

    return $(document.body);
  },

  viewportOffset: function(forElement) {
    var valueT = 0, valueL = 0;

    var element = forElement;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;

      // Safari fix
      if (element.offsetParent == document.body &&
        Element.getStyle(element, 'position') == 'absolute') break;

    } while (element = element.offsetParent);

    element = forElement;
    do {
      if (!Prototype.Browser.Opera || element.tagName == 'BODY') {
        valueT -= element.scrollTop  || 0;
        valueL -= element.scrollLeft || 0;
      }
    } while (element = element.parentNode);

    return Element._returnOffset(valueL, valueT);
  },

  clonePosition: function(element, source) {
    var options = Object.extend({
      setLeft:    true,
      setTop:     true,
      setWidth:   true,
      setHeight:  true,
      offsetTop:  0,
      offsetLeft: 0
    }, arguments[2] || { });

    // find page position of source
    source = $(source);
    var p = source.viewportOffset();

    // find coordinate system to use
    element = $(element);
    var delta = [0, 0];
    var parent = null;
    // delta [0,0] will do fine with position: fixed elements,
    // position:absolute needs offsetParent deltas
    if (Element.getStyle(element, 'position') == 'absolute') {
      parent = element.getOffsetParent();
      delta = parent.viewportOffset();
    }

    // correct by body offsets (fixes Safari)
    if (parent == document.body) {
      delta[0] -= document.body.offsetLeft;
      delta[1] -= document.body.offsetTop;
    }

    // set position
    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
    return element;
  }
};

Element.Methods.identify.counter = 1;

Object.extend(Element.Methods, {
  getElementsBySelector: Element.Methods.select,
  childElements: Element.Methods.immediateDescendants
});

Element._attributeTranslations = {
  write: {
    names: {
      className: 'class',
      htmlFor:   'for'
    },
    values: { }
  }
};

if (Prototype.Browser.Opera) {
  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
    function(proceed, element, style) {
      switch (style) {
        case 'left': case 'top': case 'right': case 'bottom':
          if (proceed(element, 'position') === 'static') return null;
        case 'height': case 'width':
          // returns '0px' for hidden elements; we want it to return null
          if (!Element.visible(element)) return null;

          // returns the border-box dimensions rather than the content-box
          // dimensions, so we subtract padding and borders from the value
          var dim = parseInt(proceed(element, style), 10);

          if (dim !== element['offset' + style.capitalize()])
            return dim + 'px';

          var properties;
          if (style === 'height') {
            properties = ['border-top-width', 'padding-top',
             'padding-bottom', 'border-bottom-width'];
          }
          else {
            properties = ['border-left-width', 'padding-left',
             'padding-right', 'border-right-width'];
          }
          return properties.inject(dim, function(memo, property) {
            var val = proceed(element, property);
            return val === null ? memo : memo - parseInt(val, 10);
          }) + 'px';
        default: return proceed(element, style);
      }
    }
  );

  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
    function(proceed, element, attribute) {
      if (attribute === 'title') return element.title;
      return proceed(element, attribute);
    }
  );
}

else if (Prototype.Browser.IE) {
  // IE doesn't report offsets correctly for static elements, so we change them
  // to "relative" to get the values, then change them back.
  Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
    function(proceed, element) {
      element = $(element);
      var position = element.getStyle('position');
      if (position !== 'static') return proceed(element);
      element.setStyle({ position: 'relative' });
      var value = proceed(element);
      element.setStyle({ position: position });
      return value;
    }
  );

  $w('positionedOffset viewportOffset').each(function(method) {
    Element.Methods[method] = Element.Methods[method].wrap(
      function(proceed, element) {
        element = $(element);
        var position = element.getStyle('position');
        if (position !== 'static') return proceed(element);
        // Trigger hasLayout on the offset parent so that IE6 reports
        // accurate offsetTop and offsetLeft values for position: fixed.
        var offsetParent = element.getOffsetParent();
        if (offsetParent && offsetParent.getStyle('position') === 'fixed')
          offsetParent.setStyle({ zoom: 1 });
        element.setStyle({ position: 'relative' });
        var value = proceed(element);
        element.setStyle({ position: position });
        return value;
      }
    );
  });

  Element.Methods.getStyle = function(element, style) {
    element = $(element);
    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
    var value = element.style[style];
    if (!value && element.currentStyle) value = element.currentStyle[style];

    if (style == 'opacity') {
      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
        if (value[1]) return parseFloat(value[1]) / 100;
      return 1.0;
    }

    if (value == 'auto') {
      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
        return element['offset' + style.capitalize()] + 'px';
      return null;
    }
    return value;
  };

  Element.Methods.setOpacity = function(element, value) {
    function stripAlpha(filter){
      return filter.replace(/alpha\([^\)]*\)/gi,'');
    }
    element = $(element);
    var currentStyle = element.currentStyle;
    if ((currentStyle && !currentStyle.hasLayout) ||
      (!currentStyle && element.style.zoom == 'normal'))
        element.style.zoom = 1;

    var filter = element.getStyle('filter'), style = element.style;
    if (value == 1 || value === '') {
      (filter = stripAlpha(filter)) ?
        style.filter = filter : style.removeAttribute('filter');
      return element;
    } else if (value < 0.00001) value = 0;
    style.filter = stripAlpha(filter) +
      'alpha(opacity=' + (value * 100) + ')';
    return element;
  };

  Element._attributeTranslations = {
    read: {
      names: {
        'class': 'className',
        'for':   'htmlFor'
      },
      values: {
        _getAttr: function(element, attribute) {
          return element.getAttribute(attribute, 2);
        },
        _getAttrNode: function(element, attribute) {
          var node = element.getAttributeNode(attribute);
          return node ? node.value : "";
        },
        _getEv: function(element, attribute) {
          attribute = element.getAttribute(attribute);
          return attribute ? attribute.toString().slice(23, -2) : null;
        },
        _flag: function(element, attribute) {
          return $(element).hasAttribute(attribute) ? attribute : null;
        },
        style: function(element) {
          return element.style.cssText.toLowerCase();
        },
        title: function(element) {
          return element.title;
        }
      }
    }
  };

  Element._attributeTranslations.write = {
    names: Object.extend({
      cellpadding: 'cellPadding',
      cellspacing: 'cellSpacing'
    }, Element._attributeTranslations.read.names),
    values: {
      checked: function(element, value) {
        element.checked = !!value;
      },

      style: function(element, value) {
        element.style.cssText = value ? value : '';
      }
    }
  };

  Element._attributeTranslations.has = {};

  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
      'encType maxLength readOnly longDesc').each(function(attr) {
    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
  });

  (function(v) {
    Object.extend(v, {
      href:        v._getAttr,
      src:         v._getAttr,
      type:        v._getAttr,
      action:      v._getAttrNode,
      disabled:    v._flag,
      checked:     v._flag,
      readonly:    v._flag,
      multiple:    v._flag,
      onload:      v._getEv,
      onunload:    v._getEv,
      onclick:     v._getEv,
      ondblclick:  v._getEv,
      onmousedown: v._getEv,
      onmouseup:   v._getEv,
      onmouseover: v._getEv,
      onmousemove: v._getEv,
      onmouseout:  v._getEv,
      onfocus:     v._getEv,
      onblur:      v._getEv,
      onkeypress:  v._getEv,
      onkeydown:   v._getEv,
      onkeyup:     v._getEv,
      onsubmit:    v._getEv,
      onreset:     v._getEv,
      onselect:    v._getEv,
      onchange:    v._getEv
    });
  })(Element._attributeTranslations.read.values);
}

else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1) ? 0.999999 :
      (value === '') ? '' : (value < 0.00001) ? 0 : value;
    return element;
  };
}

else if (Prototype.Browser.WebKit) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;

    if (value == 1)
      if(element.tagName == 'IMG' && element.width) {
        element.width++; element.width--;
      } else try {
        var n = document.createTextNode(' ');
        element.appendChild(n);
        element.removeChild(n);
      } catch (e) { }

    return element;
  };

  // Safari returns margins on body which is incorrect if the child is absolutely
  // positioned.  For performance reasons, redefine Element#cumulativeOffset for
  // KHTML/WebKit only.
  Element.Methods.cumulativeOffset = function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      if (element.offsetParent == document.body)
        if (Element.getStyle(element, 'position') == 'absolute') break;

      element = element.offsetParent;
    } while (element);

    return Element._returnOffset(valueL, valueT);
  };
}

if (Prototype.Browser.IE || Prototype.Browser.Opera) {
  // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
  Element.Methods.update = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);

    content = Object.toHTML(content);
    var tagName = element.tagName.toUpperCase();

    if (tagName in Element._insertionTranslations.tags) {
      $A(element.childNodes).each(function(node) { element.removeChild(node) });
      Element._getContentFromAnonymousElement(tagName, content.stripScripts())
        .each(function(node) { element.appendChild(node) });
    }
    else element.innerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

if ('outerHTML' in document.createElement('div')) {
  Element.Methods.replace = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) {
      element.parentNode.replaceChild(content, element);
      return element;
    }

    content = Object.toHTML(content);
    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

    if (Element._insertionTranslations.tags[tagName]) {
      var nextSibling = element.next();
      var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
      parent.removeChild(element);
      if (nextSibling)
        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
      else
        fragments.each(function(node) { parent.appendChild(node) });
    }
    else element.outerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

Element._returnOffset = function(l, t) {
  var result = [l, t];
  result.left = l;
  result.top = t;
  return result;
};

Element._getContentFromAnonymousElement = function(tagName, html) {
  var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
  if (t) {
    div.innerHTML = t[0] + html + t[1];
    t[2].times(function() { div = div.firstChild });
  } else div.innerHTML = html;
  return $A(div.childNodes);
};

Element._insertionTranslations = {
  before: function(element, node) {
    element.parentNode.insertBefore(node, element);
  },
  top: function(element, node) {
    element.insertBefore(node, element.firstChild);
  },
  bottom: function(element, node) {
    element.appendChild(node);
  },
  after: function(element, node) {
    element.parentNode.insertBefore(node, element.nextSibling);
  },
  tags: {
    TABLE:  ['<table>',                '</table>',                   1],
    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
    SELECT: ['<select>',               '</select>',                  1]
  }
};

(function() {
  Object.extend(this.tags, {
    THEAD: this.tags.TBODY,
    TFOOT: this.tags.TBODY,
    TH:    this.tags.TD
  });
}).call(Element._insertionTranslations);

Element.Methods.Simulated = {
  hasAttribute: function(element, attribute) {
    attribute = Element._attributeTranslations.has[attribute] || attribute;
    var node = $(element).getAttributeNode(attribute);
    return node && node.specified;
  }
};

Element.Methods.ByTag = { };

Object.extend(Element, Element.Methods);

if (!Prototype.BrowserFeatures.ElementExtensions &&
    document.createElement('div').__proto__) {
  window.HTMLElement = { };
  window.HTMLElement.prototype = document.createElement('div').__proto__;
  Prototype.BrowserFeatures.ElementExtensions = true;
}

Element.extend = (function() {
  if (Prototype.BrowserFeatures.SpecificElementExtensions)
    return Prototype.K;

  var Methods = { }, ByTag = Element.Methods.ByTag;

  var extend = Object.extend(function(element) {
    if (!element || element._extendedByPrototype ||
        element.nodeType != 1 || element == window) return element;

    var methods = Object.clone(Methods),
      tagName = element.tagName, property, value;

    // extend methods for specific tags
    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

    for (property in methods) {
      value = methods[property];
      if (Object.isFunction(value) && !(property in element))
        element[property] = value.methodize();
    }

    element._extendedByPrototype = Prototype.emptyFunction;
    return element;

  }, {
    refresh: function() {
      // extend methods for all tags (Safari doesn't need this)
      if (!Prototype.BrowserFeatures.ElementExtensions) {
        Object.extend(Methods, Element.Methods);
        Object.extend(Methods, Element.Methods.Simulated);
      }
    }
  });

  extend.refresh();
  return extend;
})();

Element.hasAttribute = function(element, attribute) {
  if (element.hasAttribute) return element.hasAttribute(attribute);
  return Element.Methods.Simulated.hasAttribute(element, attribute);
};

Element.addMethods = function(methods) {
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

  if (!methods) {
    Object.extend(Form, Form.Methods);
    Object.extend(Form.Element, Form.Element.Methods);
    Object.extend(Element.Methods.ByTag, {
      "FORM":     Object.clone(Form.Methods),
      "INPUT":    Object.clone(Form.Element.Methods),
      "SELECT":   Object.clone(Form.Element.Methods),
      "TEXTAREA": Object.clone(Form.Element.Methods)
    });
  }

  if (arguments.length == 2) {
    var tagName = methods;
    methods = arguments[1];
  }

  if (!tagName) Object.extend(Element.Methods, methods || { });
  else {
    if (Object.isArray(tagName)) tagName.each(extend);
    else extend(tagName);
  }

  function extend(tagName) {
    tagName = tagName.toUpperCase();
    if (!Element.Methods.ByTag[tagName])
      Element.Methods.ByTag[tagName] = { };
    Object.extend(Element.Methods.ByTag[tagName], methods);
  }

  function copy(methods, destination, onlyIfAbsent) {
    onlyIfAbsent = onlyIfAbsent || false;
    for (var property in methods) {
      var value = methods[property];
      if (!Object.isFunction(value)) continue;
      if (!onlyIfAbsent || !(property in destination))
        destination[property] = value.methodize();
    }
  }

  function findDOMClass(tagName) {
    var klass;
    var trans = {
      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
      "FrameSet", "IFRAME": "IFrame"
    };
    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName.capitalize() + 'Element';
    if (window[klass]) return window[klass];

    window[klass] = { };
    window[klass].prototype = document.createElement(tagName).__proto__;
    return window[klass];
  }

  if (F.ElementExtensions) {
    copy(Element.Methods, HTMLElement.prototype);
    copy(Element.Methods.Simulated, HTMLElement.prototype, true);
  }

  if (F.SpecificElementExtensions) {
    for (var tag in Element.Methods.ByTag) {
      var klass = findDOMClass(tag);
      if (Object.isUndefined(klass)) continue;
      copy(T[tag], klass.prototype);
    }
  }

  Object.extend(Element, Element.Methods);
  delete Element.ByTag;

  if (Element.extend.refresh) Element.extend.refresh();
  Element.cache = { };
};

document.viewport = {
  getDimensions: function() {
    var dimensions = { };
    var B = Prototype.Browser;
    $w('width height').each(function(d) {
      var D = d.capitalize();
      dimensions[d] = (B.WebKit && !document.evaluate) ? self['inner' + D] :
        (B.Opera) ? document.body['client' + D] : document.documentElement['client' + D];
    });
    return dimensions;
  },

  getWidth: function() {
    return this.getDimensions().width;
  },

  getHeight: function() {
    return this.getDimensions().height;
  },

  getScrollOffsets: function() {
    return Element._returnOffset(
      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
      window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
  }
};
/* Portions of the Selector class are derived from Jack Slocum’s DomQuery,
 * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
 * license.  Please see http://www.yui-ext.com/ for more information. */

var Selector = Class.create({
  initialize: function(expression) {
    this.expression = expression.strip();
    this.compileMatcher();
  },

  shouldUseXPath: function() {
    if (!Prototype.BrowserFeatures.XPath) return false;

    var e = this.expression;

    // Safari 3 chokes on :*-of-type and :empty
    if (Prototype.Browser.WebKit &&
     (e.include("-of-type") || e.include(":empty")))
      return false;

    // XPath can't do namespaced attributes, nor can it read
    // the "checked" property from DOM nodes
    if ((/(\[[\w-]*?:|:checked)/).test(this.expression))
      return false;

    return true;
  },

  compileMatcher: function() {
    if (this.shouldUseXPath())
      return this.compileXPathMatcher();

    var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
        c = Selector.criteria, le, p, m;

    if (Selector._cache[e]) {
      this.matcher = Selector._cache[e];
      return;
    }

    this.matcher = ["this.matcher = function(root) {",
                    "var r = root, h = Selector.handlers, c = false, n;"];

    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
    	      new Template(c[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.matcher.push("return h.unique(n);\n}");
    eval(this.matcher.join('\n'));
    Selector._cache[this.expression] = this.matcher;
  },

  compileXPathMatcher: function() {
    var e = this.expression, ps = Selector.patterns,
        x = Selector.xpath, le, m;

    if (Selector._cache[e]) {
      this.xpath = Selector._cache[e]; return;
    }

    this.matcher = ['.//*'];
    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        if (m = e.match(ps[i])) {
          this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
            new Template(x[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.xpath = this.matcher.join('');
    Selector._cache[this.expression] = this.xpath;
  },

  findElements: function(root) {
    root = root || document;
    if (this.xpath) return document._getElementsByXPath(this.xpath, root);
    return this.matcher(root);
  },

  match: function(element) {
    this.tokens = [];

    var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
    var le, p, m;

    while (e && le !== e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          // use the Selector.assertions methods unless the selector
          // is too complex.
          if (as[i]) {
            this.tokens.push([i, Object.clone(m)]);
            e = e.replace(m[0], '');
          } else {
            // reluctantly do a document-wide search
            // and look for a match in the array
            return this.findElements(document).include(element);
          }
        }
      }
    }

    var match = true, name, matches;
    for (var i = 0, token; token = this.tokens[i]; i++) {
      name = token[0], matches = token[1];
      if (!Selector.assertions[name](element, matches)) {
        match = false; break;
      }
    }

    return match;
  },

  toString: function() {
    return this.expression;
  },

  inspect: function() {
    return "#<Selector:" + this.expression.inspect() + ">";
  }
});

Object.extend(Selector, {
  _cache: { },

  xpath: {
    descendant:   "//*",
    child:        "/*",
    adjacent:     "/following-sibling::*[1]",
    laterSibling: '/following-sibling::*',
    tagName:      function(m) {
      if (m[1] == '*') return '';
      return "[local-name()='" + m[1].toLowerCase() +
             "' or local-name()='" + m[1].toUpperCase() + "']";
    },
    className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
    id:           "[@id='#{1}']",
    attrPresence: function(m) {
      m[1] = m[1].toLowerCase();
      return new Template("[@#{1}]").evaluate(m);
    },
    attr: function(m) {
      m[1] = m[1].toLowerCase();
      m[3] = m[5] || m[6];
      return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
    },
    pseudo: function(m) {
      var h = Selector.xpath.pseudos[m[1]];
      if (!h) return '';
      if (Object.isFunction(h)) return h(m);
      return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
    },
    operators: {
      '=':  "[@#{1}='#{3}']",
      '!=': "[@#{1}!='#{3}']",
      '^=': "[starts-with(@#{1}, '#{3}')]",
      '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
      '*=': "[contains(@#{1}, '#{3}')]",
      '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
      '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
    },
    pseudos: {
      'first-child': '[not(preceding-sibling::*)]',
      'last-child':  '[not(following-sibling::*)]',
      'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
      'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
      'checked':     "[@checked]",
      'disabled':    "[@disabled]",
      'enabled':     "[not(@disabled)]",
      'not': function(m) {
        var e = m[6], p = Selector.patterns,
            x = Selector.xpath, le, v;

        var exclusion = [];
        while (e && le != e && (/\S/).test(e)) {
          le = e;
          for (var i in p) {
            if (m = e.match(p[i])) {
              v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
              exclusion.push("(" + v.substring(1, v.length - 1) + ")");
              e = e.replace(m[0], '');
              break;
            }
          }
        }
        return "[not(" + exclusion.join(" and ") + ")]";
      },
      'nth-child':      function(m) {
        return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
      },
      'nth-last-child': function(m) {
        return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
      },
      'nth-of-type':    function(m) {
        return Selector.xpath.pseudos.nth("position() ", m);
      },
      'nth-last-of-type': function(m) {
        return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
      },
      'first-of-type':  function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
      },
      'last-of-type':   function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
      },
      'only-of-type':   function(m) {
        var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
      },
      nth: function(fragment, m) {
        var mm, formula = m[6], predicate;
        if (formula == 'even') formula = '2n+0';
        if (formula == 'odd')  formula = '2n+1';
        if (mm = formula.match(/^(\d+)$/)) // digit only
          return '[' + fragment + "= " + mm[1] + ']';
        if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
          if (mm[1] == "-") mm[1] = -1;
          var a = mm[1] ? Number(mm[1]) : 1;
          var b = mm[2] ? Number(mm[2]) : 0;
          predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
          "((#{fragment} - #{b}) div #{a} >= 0)]";
          return new Template(predicate).evaluate({
            fragment: fragment, a: a, b: b });
        }
      }
    }
  },

  criteria: {
    tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
    className:    'n = h.className(n, r, "#{1}", c);    c = false;',
    id:           'n = h.id(n, r, "#{1}", c);           c = false;',
    attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
    attr: function(m) {
      m[3] = (m[5] || m[6]);
      return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
    },
    pseudo: function(m) {
      if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
      return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
    },
    descendant:   'c = "descendant";',
    child:        'c = "child";',
    adjacent:     'c = "adjacent";',
    laterSibling: 'c = "laterSibling";'
  },

  patterns: {
    // combinators must be listed first
    // (and descendant needs to be last combinator)
    laterSibling: /^\s*~\s*/,
    child:        /^\s*>\s*/,
    adjacent:     /^\s*\+\s*/,
    descendant:   /^\s/,

    // selectors follow
    tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
    id:           /^#([\w\-\*]+)(\b|$)/,
    className:    /^\.([\w\-\*]+)(\b|$)/,
    pseudo:
/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
    attrPresence: /^\[([\w]+)\]/,
    attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
  },

  // for Selector.match and Element#match
  assertions: {
    tagName: function(element, matches) {
      return matches[1].toUpperCase() == element.tagName.toUpperCase();
    },

    className: function(element, matches) {
      return Element.hasClassName(element, matches[1]);
    },

    id: function(element, matches) {
      return element.id === matches[1];
    },

    attrPresence: function(element, matches) {
      return Element.hasAttribute(element, matches[1]);
    },

    attr: function(element, matches) {
      var nodeValue = Element.readAttribute(element, matches[1]);
      return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
    }
  },

  handlers: {
    // UTILITY FUNCTIONS
    // joins two collections
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        a.push(node);
      return a;
    },

    // marks an array of nodes for counting
    mark: function(nodes) {
      var _true = Prototype.emptyFunction;
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = _true;
      return nodes;
    },

    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = undefined;
      return nodes;
    },

    // mark each child node with its position (for nth calls)
    // "ofType" flag indicates whether we're indexing for nth-of-type
    // rather than nth-child
    index: function(parentNode, reverse, ofType) {
      parentNode._countedByPrototype = Prototype.emptyFunction;
      if (reverse) {
        for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
          var node = nodes[i];
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
        }
      } else {
        for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
      }
    },

    // filters out duplicates and extends all nodes
    unique: function(nodes) {
      if (nodes.length == 0) return nodes;
      var results = [], n;
      for (var i = 0, l = nodes.length; i < l; i++)
        if (!(n = nodes[i])._countedByPrototype) {
          n._countedByPrototype = Prototype.emptyFunction;
          results.push(Element.extend(n));
        }
      return Selector.handlers.unmark(results);
    },

    // COMBINATOR FUNCTIONS
    descendant: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, node.getElementsByTagName('*'));
      return results;
    },

    child: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        for (var j = 0, child; child = node.childNodes[j]; j++)
          if (child.nodeType == 1 && child.tagName != '!') results.push(child);
      }
      return results;
    },

    adjacent: function(nodes) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        var next = this.nextElementSibling(node);
        if (next) results.push(next);
      }
      return results;
    },

    laterSibling: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, Element.nextSiblings(node));
      return results;
    },

    nextElementSibling: function(node) {
      while (node = node.nextSibling)
	      if (node.nodeType == 1) return node;
      return null;
    },

    previousElementSibling: function(node) {
      while (node = node.previousSibling)
        if (node.nodeType == 1) return node;
      return null;
    },

    // TOKEN FUNCTIONS
    tagName: function(nodes, root, tagName, combinator) {
      var uTagName = tagName.toUpperCase();
      var results = [], h = Selector.handlers;
      if (nodes) {
        if (combinator) {
          // fastlane for ordinary descendant combinators
          if (combinator == "descendant") {
            for (var i = 0, node; node = nodes[i]; i++)
              h.concat(results, node.getElementsByTagName(tagName));
            return results;
          } else nodes = this[combinator](nodes);
          if (tagName == "*") return nodes;
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.tagName.toUpperCase() === uTagName) results.push(node);
        return results;
      } else return root.getElementsByTagName(tagName);
    },

    id: function(nodes, root, id, combinator) {
      var targetNode = $(id), h = Selector.handlers;
      if (!targetNode) return [];
      if (!nodes && root == document) return [targetNode];
      if (nodes) {
        if (combinator) {
          if (combinator == 'child') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (targetNode.parentNode == node) return [targetNode];
          } else if (combinator == 'descendant') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Element.descendantOf(targetNode, node)) return [targetNode];
          } else if (combinator == 'adjacent') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Selector.handlers.previousElementSibling(targetNode) == node)
                return [targetNode];
          } else nodes = h[combinator](nodes);
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node == targetNode) return [targetNode];
        return [];
      }
      return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
    },

    className: function(nodes, root, className, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      return Selector.handlers.byClassName(nodes, root, className);
    },

    byClassName: function(nodes, root, className) {
      if (!nodes) nodes = Selector.handlers.descendant([root]);
      var needle = ' ' + className + ' ';
      for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
        nodeClassName = node.className;
        if (nodeClassName.length == 0) continue;
        if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
          results.push(node);
      }
      return results;
    },

    attrPresence: function(nodes, root, attr, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var results = [];
      for (var i = 0, node; node = nodes[i]; i++)
        if (Element.hasAttribute(node, attr)) results.push(node);
      return results;
    },

    attr: function(nodes, root, attr, value, operator, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var handler = Selector.operators[operator], results = [];
      for (var i = 0, node; node = nodes[i]; i++) {
        var nodeValue = Element.readAttribute(node, attr);
        if (nodeValue === null) continue;
        if (handler(nodeValue, value)) results.push(node);
      }
      return results;
    },

    pseudo: function(nodes, name, value, root, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      if (!nodes) nodes = root.getElementsByTagName("*");
      return Selector.pseudos[name](nodes, value, root);
    }
  },

  pseudos: {
    'first-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.previousElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'last-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.nextElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'only-child': function(nodes, value, root) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
          results.push(node);
      return results;
    },
    'nth-child':        function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root);
    },
    'nth-last-child':   function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true);
    },
    'nth-of-type':      function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, false, true);
    },
    'nth-last-of-type': function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true, true);
    },
    'first-of-type':    function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, false, true);
    },
    'last-of-type':     function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, true, true);
    },
    'only-of-type':     function(nodes, formula, root) {
      var p = Selector.pseudos;
      return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
    },

    // handles the an+b logic
    getIndices: function(a, b, total) {
      if (a == 0) return b > 0 ? [b] : [];
      return $R(1, total).inject([], function(memo, i) {
        if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
        return memo;
      });
    },

    // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
    nth: function(nodes, formula, root, reverse, ofType) {
      if (nodes.length == 0) return [];
      if (formula == 'even') formula = '2n+0';
      if (formula == 'odd')  formula = '2n+1';
      var h = Selector.handlers, results = [], indexed = [], m;
      h.mark(nodes);
      for (var i = 0, node; node = nodes[i]; i++) {
        if (!node.parentNode._countedByPrototype) {
          h.index(node.parentNode, reverse, ofType);
          indexed.push(node.parentNode);
        }
      }
      if (formula.match(/^\d+$/)) { // just a number
        formula = Number(formula);
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.nodeIndex == formula) results.push(node);
      } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
        if (m[1] == "-") m[1] = -1;
        var a = m[1] ? Number(m[1]) : 1;
        var b = m[2] ? Number(m[2]) : 0;
        var indices = Selector.pseudos.getIndices(a, b, nodes.length);
        for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
          for (var j = 0; j < l; j++)
            if (node.nodeIndex == indices[j]) results.push(node);
        }
      }
      h.unmark(nodes);
      h.unmark(indexed);
      return results;
    },

    'empty': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        // IE treats comments as element nodes
        if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
        results.push(node);
      }
      return results;
    },

    'not': function(nodes, selector, root) {
      var h = Selector.handlers, selectorType, m;
      var exclusions = new Selector(selector).findElements(root);
      h.mark(exclusions);
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node._countedByPrototype) results.push(node);
      h.unmark(exclusions);
      return results;
    },

    'enabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node.disabled) results.push(node);
      return results;
    },

    'disabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.disabled) results.push(node);
      return results;
    },

    'checked': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.checked) results.push(node);
      return results;
    }
  },

  operators: {
    '=':  function(nv, v) { return nv == v; },
    '!=': function(nv, v) { return nv != v; },
    '^=': function(nv, v) { return nv.startsWith(v); },
    '$=': function(nv, v) { return nv.endsWith(v); },
    '*=': function(nv, v) { return nv.include(v); },
    '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
    '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
  },

  split: function(expression) {
    var expressions = [];
    expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
      expressions.push(m[1].strip());
    });
    return expressions;
  },

  matchElements: function(elements, expression) {
    var matches = $$(expression), h = Selector.handlers;
    h.mark(matches);
    for (var i = 0, results = [], element; element = elements[i]; i++)
      if (element._countedByPrototype) results.push(element);
    h.unmark(matches);
    return results;
  },

  findElement: function(elements, expression, index) {
    if (Object.isNumber(expression)) {
      index = expression; expression = false;
    }
    return Selector.matchElements(elements, expression || '*')[index || 0];
  },

  findChildElements: function(element, expressions) {
    expressions = Selector.split(expressions.join(','));
    var results = [], h = Selector.handlers;
    for (var i = 0, l = expressions.length, selector; i < l; i++) {
      selector = new Selector(expressions[i].strip());
      h.concat(results, selector.findElements(element));
    }
    return (l > 1) ? h.unique(results) : results;
  }
});

if (Prototype.Browser.IE) {
  Object.extend(Selector.handlers, {
    // IE returns comment nodes on getElementsByTagName("*").
    // Filter them out.
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        if (node.tagName !== "!") a.push(node);
      return a;
    },

    // IE improperly serializes _countedByPrototype in (inner|outer)HTML.
    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node.removeAttribute('_countedByPrototype');
      return nodes;
    }
  });
}

function $$() {
  return Selector.findChildElements(document, $A(arguments));
}
var Form = {
  reset: function(form) {
    $(form).reset();
    return form;
  },

  serializeElements: function(elements, options) {
    if (typeof options != 'object') options = { hash: !!options };
    else if (Object.isUndefined(options.hash)) options.hash = true;
    var key, value, submitted = false, submit = options.submit;

    var data = elements.inject({ }, function(result, element) {
      if (!element.disabled && element.name) {
        key = element.name; value = $(element).getValue();
        if (value != null && (element.type != 'submit' || (!submitted &&
            submit !== false && (!submit || key == submit) && (submitted = true)))) {
          if (key in result) {
            // a key is already present; construct an array of values
            if (!Object.isArray(result[key])) result[key] = [result[key]];
            result[key].push(value);
          }
          else result[key] = value;
        }
      }
      return result;
    });

    return options.hash ? data : Object.toQueryString(data);
  }
};

Form.Methods = {
  serialize: function(form, options) {
    return Form.serializeElements(Form.getElements(form), options);
  },

  getElements: function(form) {
    return $A($(form).getElementsByTagName('*')).inject([],
      function(elements, child) {
        if (Form.Element.Serializers[child.tagName.toLowerCase()])
          elements.push(Element.extend(child));
        return elements;
      }
    );
  },

  getInputs: function(form, typeName, name) {
    form = $(form);
    var inputs = form.getElementsByTagName('input');

    if (!typeName && !name) return $A(inputs).map(Element.extend);

    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
      var input = inputs[i];
      if ((typeName && input.type != typeName) || (name && input.name != name))
        continue;
      matchingInputs.push(Element.extend(input));
    }

    return matchingInputs;
  },

  disable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('disable');
    return form;
  },

  enable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('enable');
    return form;
  },

  findFirstElement: function(form) {
    var elements = $(form).getElements().findAll(function(element) {
      return 'hidden' != element.type && !element.disabled;
    });
    var firstByIndex = elements.findAll(function(element) {
      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
    }).sortBy(function(element) { return element.tabIndex }).first();

    return firstByIndex ? firstByIndex : elements.find(function(element) {
      return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
    });
  },

  focusFirstElement: function(form) {
    form = $(form);
    form.findFirstElement().activate();
    return form;
  },

  request: function(form, options) {
    form = $(form), options = Object.clone(options || { });

    var params = options.parameters, action = form.readAttribute('action') || '';
    if (action.blank()) action = window.location.href;
    options.parameters = form.serialize(true);

    if (params) {
      if (Object.isString(params)) params = params.toQueryParams();
      Object.extend(options.parameters, params);
    }

    if (form.hasAttribute('method') && !options.method)
      options.method = form.method;

    return new Ajax.Request(action, options);
  }
};

/*--------------------------------------------------------------------------*/

Form.Element = {
  focus: function(element) {
    $(element).focus();
    return element;
  },

  select: function(element) {
    $(element).select();
    return element;
  }
};

Form.Element.Methods = {
  serialize: function(element) {
    element = $(element);
    if (!element.disabled && element.name) {
      var value = element.getValue();
      if (value != undefined) {
        var pair = { };
        pair[element.name] = value;
        return Object.toQueryString(pair);
      }
    }
    return '';
  },

  getValue: function(element) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    return Form.Element.Serializers[method](element);
  },

  setValue: function(element, value) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    Form.Element.Serializers[method](element, value);
    return element;
  },

  clear: function(element) {
    $(element).value = '';
    return element;
  },

  present: function(element) {
    return $(element).value != '';
  },

  activate: function(element) {
    element = $(element);
    try {
      element.focus();
      if (element.select && (element.tagName.toLowerCase() != 'input' ||
          !['button', 'reset', 'submit'].include(element.type)))
        element.select();
    } catch (e) { }
    return element;
  },

  disable: function(element) {
    element = $(element);
    element.blur();
    element.disabled = true;
    return element;
  },

  enable: function(element) {
    element = $(element);
    element.disabled = false;
    return element;
  }
};

/*--------------------------------------------------------------------------*/

var Field = Form.Element;
var $F = Form.Element.Methods.getValue;

/*--------------------------------------------------------------------------*/

Form.Element.Serializers = {
  input: function(element, value) {
    switch (element.type.toLowerCase()) {
      case 'checkbox':
      case 'radio':
        return Form.Element.Serializers.inputSelector(element, value);
      default:
        return Form.Element.Serializers.textarea(element, value);
    }
  },

  inputSelector: function(element, value) {
    if (Object.isUndefined(value)) return element.checked ? element.value : null;
    else element.checked = !!value;
  },

  textarea: function(element, value) {
    if (Object.isUndefined(value)) return element.value;
    else element.value = value;
  },

  select: function(element, index) {
    if (Object.isUndefined(index))
      return this[element.type == 'select-one' ?
        'selectOne' : 'selectMany'](element);
    else {
      var opt, value, single = !Object.isArray(index);
      for (var i = 0, length = element.length; i < length; i++) {
        opt = element.options[i];
        value = this.optionValue(opt);
        if (single) {
          if (value == index) {
            opt.selected = true;
            return;
          }
        }
        else opt.selected = index.include(value);
      }
    }
  },

  selectOne: function(element) {
    var index = element.selectedIndex;
    return index >= 0 ? this.optionValue(element.options[index]) : null;
  },

  selectMany: function(element) {
    var values, length = element.length;
    if (!length) return null;

    for (var i = 0, values = []; i < length; i++) {
      var opt = element.options[i];
      if (opt.selected) values.push(this.optionValue(opt));
    }
    return values;
  },

  optionValue: function(opt) {
    // extend element because hasAttribute may not be native
    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
  }
};

/*--------------------------------------------------------------------------*/

Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
  initialize: function($super, element, frequency, callback) {
    $super(callback, frequency);
    this.element   = $(element);
    this.lastValue = this.getValue();
  },

  execute: function() {
    var value = this.getValue();
    if (Object.isString(this.lastValue) && Object.isString(value) ?
        this.lastValue != value : String(this.lastValue) != String(value)) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  }
});

Form.Element.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = Class.create({
  initialize: function(element, callback) {
    this.element  = $(element);
    this.callback = callback;

    this.lastValue = this.getValue();
    if (this.element.tagName.toLowerCase() == 'form')
      this.registerFormCallbacks();
    else
      this.registerCallback(this.element);
  },

  onElementEvent: function() {
    var value = this.getValue();
    if (this.lastValue != value) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  },

  registerFormCallbacks: function() {
    Form.getElements(this.element).each(this.registerCallback, this);
  },

  registerCallback: function(element) {
    if (element.type) {
      switch (element.type.toLowerCase()) {
        case 'checkbox':
        case 'radio':
          Event.observe(element, 'click', this.onElementEvent.bind(this));
          break;
        default:
          Event.observe(element, 'change', this.onElementEvent.bind(this));
          break;
      }
    }
  }
});

Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});
if (!window.Event) var Event = { };

Object.extend(Event, {
  KEY_BACKSPACE: 8,
  KEY_TAB:       9,
  KEY_RETURN:   13,
  KEY_ESC:      27,
  KEY_LEFT:     37,
  KEY_UP:       38,
  KEY_RIGHT:    39,
  KEY_DOWN:     40,
  KEY_DELETE:   46,
  KEY_HOME:     36,
  KEY_END:      35,
  KEY_PAGEUP:   33,
  KEY_PAGEDOWN: 34,
  KEY_INSERT:   45,

  cache: { },

  relatedTarget: function(event) {
    var element;
    switch(event.type) {
      case 'mouseover': element = event.fromElement; break;
      case 'mouseout':  element = event.toElement;   break;
      default: return null;
    }
    return Element.extend(element);
  }
});

Event.Methods = (function() {
  var isButton;

  if (Prototype.Browser.IE) {
    var buttonMap = { 0: 1, 1: 4, 2: 2 };
    isButton = function(event, code) {
      return event.button == buttonMap[code];
    };

  } else if (Prototype.Browser.WebKit) {
    isButton = function(event, code) {
      switch (code) {
        case 0: return event.which == 1 && !event.metaKey;
        case 1: return event.which == 1 && event.metaKey;
        default: return false;
      }
    };

  } else {
    isButton = function(event, code) {
      return event.which ? (event.which === code + 1) : (event.button === code);
    };
  }

  return {
    isLeftClick:   function(event) { return isButton(event, 0) },
    isMiddleClick: function(event) { return isButton(event, 1) },
    isRightClick:  function(event) { return isButton(event, 2) },

    element: function(event) {
      var node = Event.extend(event).target;
      return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node);
    },

    findElement: function(event, expression) {
      var element = Event.element(event);
      if (!expression) return element;
      var elements = [element].concat(element.ancestors());
      return Selector.findElement(elements, expression, 0);
    },

    pointer: function(event) {
      return {
        x: event.pageX || (event.clientX +
          (document.documentElement.scrollLeft || document.body.scrollLeft)),
        y: event.pageY || (event.clientY +
          (document.documentElement.scrollTop || document.body.scrollTop))
      };
    },

    pointerX: function(event) { return Event.pointer(event).x },
    pointerY: function(event) { return Event.pointer(event).y },

    stop: function(event) {
      Event.extend(event);
      event.preventDefault();
      event.stopPropagation();
      event.stopped = true;
    }
  };
})();

Event.extend = (function() {
  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
    m[name] = Event.Methods[name].methodize();
    return m;
  });

  if (Prototype.Browser.IE) {
    Object.extend(methods, {
      stopPropagation: function() { this.cancelBubble = true },
      preventDefault:  function() { this.returnValue = false },
      inspect: function() { return "[object Event]" }
    });

    return function(event) {
      if (!event) return false;
      if (event._extendedByPrototype) return event;

      event._extendedByPrototype = Prototype.emptyFunction;
      var pointer = Event.pointer(event);
      Object.extend(event, {
        target: event.srcElement,
        relatedTarget: Event.relatedTarget(event),
        pageX:  pointer.x,
        pageY:  pointer.y
      });
      return Object.extend(event, methods);
    };

  } else {
    Event.prototype = Event.prototype || document.createEvent("HTMLEvents").__proto__;
    Object.extend(Event.prototype, methods);
    return Prototype.K;
  }
})();

Object.extend(Event, (function() {
  var cache = Event.cache;

  function getEventID(element) {
    if (element._prototypeEventID) return element._prototypeEventID[0];
    arguments.callee.id = arguments.callee.id || 1;
    return element._prototypeEventID = [++arguments.callee.id];
  }

  function getDOMEventName(eventName) {
    if (eventName && eventName.include(':')) return "dataavailable";
    return eventName;
  }

  function getCacheForID(id) {
    return cache[id] = cache[id] || { };
  }

  function getWrappersForEventName(id, eventName) {
    var c = getCacheForID(id);
    return c[eventName] = c[eventName] || [];
  }

  function createWrapper(element, eventName, handler) {
    var id = getEventID(element);
    var c = getWrappersForEventName(id, eventName);
    if (c.pluck("handler").include(handler)) return false;

    var wrapper = function(event) {
      if (!Event || !Event.extend ||
        (event.eventName && event.eventName != eventName))
          return false;

      Event.extend(event);
      handler.call(element, event);
    };

    wrapper.handler = handler;
    c.push(wrapper);
    return wrapper;
  }

  function findWrapper(id, eventName, handler) {
    var c = getWrappersForEventName(id, eventName);
    return c.find(function(wrapper) { return wrapper.handler == handler });
  }

  function destroyWrapper(id, eventName, handler) {
    var c = getCacheForID(id);
    if (!c[eventName]) return false;
    c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
  }

  function destroyCache() {
    for (var id in cache)
      for (var eventName in cache[id])
        cache[id][eventName] = null;
  }

  if (window.attachEvent) {
    window.attachEvent("onunload", destroyCache);
  }

  return {
    observe: function(element, eventName, handler) {
      element = $(element);
      var name = getDOMEventName(eventName);

      var wrapper = createWrapper(element, eventName, handler);
      if (!wrapper) return element;

      if (element.addEventListener) {
        element.addEventListener(name, wrapper, false);
      } else {
        element.attachEvent("on" + name, wrapper);
      }

      return element;
    },

    stopObserving: function(element, eventName, handler) {
      element = $(element);
      var id = getEventID(element), name = getDOMEventName(eventName);

      if (!handler && eventName) {
        getWrappersForEventName(id, eventName).each(function(wrapper) {
          element.stopObserving(eventName, wrapper.handler);
        });
        return element;

      } else if (!eventName) {
        Object.keys(getCacheForID(id)).each(function(eventName) {
          element.stopObserving(eventName);
        });
        return element;
      }

      var wrapper = findWrapper(id, eventName, handler);
      if (!wrapper) return element;

      if (element.removeEventListener) {
        element.removeEventListener(name, wrapper, false);
      } else {
        element.detachEvent("on" + name, wrapper);
      }

      destroyWrapper(id, eventName, handler);

      return element;
    },

    fire: function(element, eventName, memo) {
      element = $(element);
      if (element == document && document.createEvent && !element.dispatchEvent)
        element = document.documentElement;

      var event;
      if (document.createEvent) {
        event = document.createEvent("HTMLEvents");
        event.initEvent("dataavailable", true, true);
      } else {
        event = document.createEventObject();
        event.eventType = "ondataavailable";
      }

      event.eventName = eventName;
      event.memo = memo || { };

      if (document.createEvent) {
        element.dispatchEvent(event);
      } else {
        element.fireEvent(event.eventType, event);
      }

      return Event.extend(event);
    }
  };
})());

Object.extend(Event, Event.Methods);

Element.addMethods({
  fire:          Event.fire,
  observe:       Event.observe,
  stopObserving: Event.stopObserving
});

Object.extend(document, {
  fire:          Element.Methods.fire.methodize(),
  observe:       Element.Methods.observe.methodize(),
  stopObserving: Element.Methods.stopObserving.methodize(),
  loaded:        false
});

(function() {
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
     Matthias Miller, Dean Edwards and John Resig. */

  var timer;

  function fireContentLoadedEvent() {
    if (document.loaded) return;
    if (timer) window.clearInterval(timer);
    document.fire("dom:loaded");
    document.loaded = true;
  }

  if (document.addEventListener) {
    if (Prototype.Browser.WebKit) {
      timer = window.setInterval(function() {
        if (/loaded|complete/.test(document.readyState))
          fireContentLoadedEvent();
      }, 0);

      Event.observe(window, "load", fireContentLoadedEvent);

    } else {
      document.addEventListener("DOMContentLoaded",
        fireContentLoadedEvent, false);
    }

  } else {
    document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
    $("__onDOMContentLoaded").onreadystatechange = function() {
      if (this.readyState == "complete") {
        this.onreadystatechange = null;
        fireContentLoadedEvent();
      }
    };
  }
})();
/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.childOf = Element.Methods.descendantOf;

var Insertion = {
  Before: function(element, content) {
    return Element.insert(element, {before:content});
  },

  Top: function(element, content) {
    return Element.insert(element, {top:content});
  },

  Bottom: function(element, content) {
    return Element.insert(element, {bottom:content});
  },

  After: function(element, content) {
    return Element.insert(element, {after:content});
  }
};

var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

// This should be moved to script.aculo.us; notice the deprecated methods
// further below, that map to the newer Element methods.
var Position = {
  // set to true if needed, warning: firefox performance problems
  // NOT neeeded for page scrolling, only if draggable contained in
  // scrollable elements
  includeScrollOffsets: false,

  // must be called before calling withinIncludingScrolloffset, every time the
  // page is scrolled
  prepare: function() {
    this.deltaX =  window.pageXOffset
                || document.documentElement.scrollLeft
                || document.body.scrollLeft
                || 0;
    this.deltaY =  window.pageYOffset
                || document.documentElement.scrollTop
                || document.body.scrollTop
                || 0;
  },

  // caches x/y coordinate pair to use with overlap
  within: function(element, x, y) {
    if (this.includeScrollOffsets)
      return this.withinIncludingScrolloffsets(element, x, y);
    this.xcomp = x;
    this.ycomp = y;
    this.offset = Element.cumulativeOffset(element);

    return (y >= this.offset[1] &&
            y <  this.offset[1] + element.offsetHeight &&
            x >= this.offset[0] &&
            x <  this.offset[0] + element.offsetWidth);
  },

  withinIncludingScrolloffsets: function(element, x, y) {
    var offsetcache = Element.cumulativeScrollOffset(element);

    this.xcomp = x + offsetcache[0] - this.deltaX;
    this.ycomp = y + offsetcache[1] - this.deltaY;
    this.offset = Element.cumulativeOffset(element);

    return (this.ycomp >= this.offset[1] &&
            this.ycomp <  this.offset[1] + element.offsetHeight &&
            this.xcomp >= this.offset[0] &&
            this.xcomp <  this.offset[0] + element.offsetWidth);
  },

  // within must be called directly before
  overlap: function(mode, element) {
    if (!mode) return 0;
    if (mode == 'vertical')
      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
        element.offsetHeight;
    if (mode == 'horizontal')
      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
        element.offsetWidth;
  },

  // Deprecation layer -- use newer Element methods now (1.5.2).

  cumulativeOffset: Element.Methods.cumulativeOffset,

  positionedOffset: Element.Methods.positionedOffset,

  absolutize: function(element) {
    Position.prepare();
    return Element.absolutize(element);
  },

  relativize: function(element) {
    Position.prepare();
    return Element.relativize(element);
  },

  realOffset: Element.Methods.cumulativeScrollOffset,

  offsetParent: Element.Methods.getOffsetParent,

  page: Element.Methods.viewportOffset,

  clone: function(source, target, options) {
    options = options || { };
    return Element.clonePosition(target, source, options);
  }
};

/*--------------------------------------------------------------------------*/

if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
  function iter(name) {
    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
  }

  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
  function(element, className) {
    className = className.toString().strip();
    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
  } : function(element, className) {
    className = className.toString().strip();
    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
    if (!classNames && !className) return elements;

    var nodes = $(element).getElementsByTagName('*');
    className = ' ' + className + ' ';

    for (var i = 0, child, cn; child = nodes[i]; i++) {
      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
          (classNames && classNames.all(function(name) {
            return !name.toString().blank() && cn.include(' ' + name + ' ');
          }))))
        elements.push(Element.extend(child));
    }
    return elements;
  };

  return function(className, parentElement) {
    return $(parentElement || document.body).getElementsByClassName(className);
  };
}(Element.Methods);

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
  initialize: function(element) {
    this.element = $(element);
  },

  _each: function(iterator) {
    this.element.className.split(/\s+/).select(function(name) {
      return name.length > 0;
    })._each(iterator);
  },

  set: function(className) {
    this.element.className = className;
  },

  add: function(classNameToAdd) {
    if (this.include(classNameToAdd)) return;
    this.set($A(this).concat(classNameToAdd).join(' '));
  },

  remove: function(classNameToRemove) {
    if (!this.include(classNameToRemove)) return;
    this.set($A(this).without(classNameToRemove).join(' '));
  },

  toString: function() {
    return $A(this).join(' ');
  }
};

Object.extend(Element.ClassNames.prototype, Enumerable);

/*--------------------------------------------------------------------------*/

Element.addMethods();
// script.aculo.us scriptaculous.js v1.8.0, Tue Nov 06 15:01:40 +0300 2007

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// For details, see the script.aculo.us web site: http://script.aculo.us/

var Scriptaculous = {
  Version: '1.8.0',
  REQUIRED_PROTOTYPE: '1.6.0'
}

var Builder = {
  NODEMAP: {
    AREA: 'map',
    CAPTION: 'table',
    COL: 'table',
    COLGROUP: 'table',
    LEGEND: 'fieldset',
    OPTGROUP: 'select',
    OPTION: 'select',
    PARAM: 'object',
    TBODY: 'table',
    TD: 'table',
    TFOOT: 'table',
    TH: 'table',
    THEAD: 'table',
    TR: 'table'
  },
  // note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
  //       due to a Firefox bug
  node: function(elementName) {
    elementName = elementName.toUpperCase();
    
    // try innerHTML approach
    var parentTag = this.NODEMAP[elementName] || 'div';
    var parentElement = document.createElement(parentTag);
    try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
      parentElement.innerHTML = "<" + elementName + "></" + elementName + ">";
    } catch(e) {}
    var element = parentElement.firstChild || null;
      
    // see if browser added wrapping tags
    if(element && (element.tagName.toUpperCase() != elementName))
      element = element.getElementsByTagName(elementName)[0];
    
    // fallback to createElement approach
    if(!element) element = document.createElement(elementName);
    
    // abort if nothing could be created
    if(!element) return;

    // attributes (or text)
    if(arguments[1])
      if(this._isStringOrNumber(arguments[1]) ||
        (arguments[1] instanceof Array) ||
        arguments[1].tagName) {
          this._children(element, arguments[1]);
        } else {
          var attrs = this._attributes(arguments[1]);
          if(attrs.length) {
            try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
              parentElement.innerHTML = "<" +elementName + " " +
                attrs + "></" + elementName + ">";
            } catch(e) {}
            element = parentElement.firstChild || null;
            // workaround firefox 1.0.X bug
            if(!element) {
              element = document.createElement(elementName);
              for(attr in arguments[1]) 
                element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
            }
            if(element.tagName.toUpperCase() != elementName)
              element = parentElement.getElementsByTagName(elementName)[0];
          }
        } 

    // text, or array of children
    if(arguments[2])
      this._children(element, arguments[2]);

     return element;
  },
  _text: function(text) {
     return document.createTextNode(text);
  },

  ATTR_MAP: {
    'className': 'class',
    'htmlFor': 'for'
  },

  _attributes: function(attributes) {
    var attrs = [];
    for(attribute in attributes)
      attrs.push((attribute in this.ATTR_MAP ? this.ATTR_MAP[attribute] : attribute) +
          '="' + attributes[attribute].toString().escapeHTML().gsub(/"/,'&quot;') + '"');
    return attrs.join(" ");
  },
  _children: function(element, children) {
    if(children.tagName) {
      element.appendChild(children);
      return;
    }
    if(typeof children=='object') { // array can hold nodes and text
      children.flatten().each( function(e) {
        if(typeof e=='object')
          element.appendChild(e)
        else
          if(Builder._isStringOrNumber(e))
            element.appendChild(Builder._text(e));
      });
    } else
      if(Builder._isStringOrNumber(children))
        element.appendChild(Builder._text(children));
  },
  _isStringOrNumber: function(param) {
    return(typeof param=='string' || typeof param=='number');
  },
  build: function(html) {
    var element = this.node('div');
    $(element).update(html.strip());
    return element.down();
  },
  dump: function(scope) { 
    if(typeof scope != 'object' && typeof scope != 'function') scope = window; //global scope 
  
    var tags = ("A ABBR ACRONYM ADDRESS APPLET AREA B BASE BASEFONT BDO BIG BLOCKQUOTE BODY " +
      "BR BUTTON CAPTION CENTER CITE CODE COL COLGROUP DD DEL DFN DIR DIV DL DT EM FIELDSET " +
      "FONT FORM FRAME FRAMESET H1 H2 H3 H4 H5 H6 HEAD HR HTML I IFRAME IMG INPUT INS ISINDEX "+
      "KBD LABEL LEGEND LI LINK MAP MENU META NOFRAMES NOSCRIPT OBJECT OL OPTGROUP OPTION P "+
      "PARAM PRE Q S SAMP SCRIPT SELECT SMALL SPAN STRIKE STRONG STYLE SUB SUP TABLE TBODY TD "+
      "TEXTAREA TFOOT TH THEAD TITLE TR TT U UL VAR").split(/\s+/);
  
    tags.each( function(tag){ 
      scope[tag] = function() { 
        return Builder.node.apply(Builder, [tag].concat($A(arguments)));  
      } 
    });
  }
}

String.prototype.parseColor = function() {  
  var color = '#';
  if (this.slice(0,4) == 'rgb(') {  
    var cols = this.slice(4,this.length-1).split(',');  
    var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);  
  } else {  
    if (this.slice(0,1) == '#') {  
      if (this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();  
      if (this.length==7) color = this.toLowerCase();  
    }  
  }  
  return (color.length==7 ? color : (arguments[0] || this));  
};

/*--------------------------------------------------------------------------*/

Element.collectTextNodes = function(element) {  
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue : 
      (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
  }).flatten().join('');
};

Element.collectTextNodesIgnoreClass = function(element, className) {  
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue : 
      ((node.hasChildNodes() && !Element.hasClassName(node,className)) ? 
        Element.collectTextNodesIgnoreClass(node, className) : ''));
  }).flatten().join('');
};

Element.setContentZoom = function(element, percent) {
  element = $(element);  
  element.setStyle({fontSize: (percent/100) + 'em'});   
  if (Prototype.Browser.WebKit) window.scrollBy(0,0);
  return element;
};

Element.getInlineOpacity = function(element){
  return $(element).style.opacity || '';
};

Element.forceRerendering = function(element) {
  try {
    element = $(element);
    var n = document.createTextNode(' ');
    element.appendChild(n);
    element.removeChild(n);
  } catch(e) { }
};

/*--------------------------------------------------------------------------*/

var Effect = {
  _elementDoesNotExistError: {
    name: 'ElementDoesNotExistError',
    message: 'The specified DOM element does not exist, but is required for this effect to operate'
  },
  Transitions: {
    linear: Prototype.K,
    sinoidal: function(pos) {
      return (-Math.cos(pos*Math.PI)/2) + 0.5;
    },
    reverse: function(pos) {
      return 1-pos;
    },
    flicker: function(pos) {
      var pos = ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
      return pos > 1 ? 1 : pos;
    },
    wobble: function(pos) {
      return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
    },
    pulse: function(pos, pulses) { 
      pulses = pulses || 5; 
      return (
        ((pos % (1/pulses)) * pulses).round() == 0 ? 
              ((pos * pulses * 2) - (pos * pulses * 2).floor()) : 
          1 - ((pos * pulses * 2) - (pos * pulses * 2).floor())
        );
    },
    spring: function(pos) { 
      return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6)); 
    },
    none: function(pos) {
      return 0;
    },
    full: function(pos) {
      return 1;
    }
  },
  DefaultOptions: {
    duration:   1.0,   // seconds
    fps:        100,   // 100= assume 66fps max.
    sync:       false, // true for combining
    from:       0.0,
    to:         1.0,
    delay:      0.0,
    queue:      'parallel'
  },
  tagifyText: function(element) {
    var tagifyStyle = 'position:relative';
    if (Prototype.Browser.IE) tagifyStyle += ';zoom:1';
    
    element = $(element);
    $A(element.childNodes).each( function(child) {
      if (child.nodeType==3) {
        child.nodeValue.toArray().each( function(character) {
          element.insertBefore(
            new Element('span', {style: tagifyStyle}).update(
              character == ' ' ? String.fromCharCode(160) : character), 
              child);
        });
        Element.remove(child);
      }
    });
  },
  multiple: function(element, effect) {
    var elements;
    if (((typeof element == 'object') || 
        Object.isFunction(element)) && 
       (element.length))
      elements = element;
    else
      elements = $(element).childNodes;
      
    var options = Object.extend({
      speed: 0.1,
      delay: 0.0
    }, arguments[2] || { });
    var masterDelay = options.delay;

    $A(elements).each( function(element, index) {
      new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
    });
  },
  PAIRS: {
    'slide':  ['SlideDown','SlideUp'],
    'blind':  ['BlindDown','BlindUp'],
    'appear': ['Appear','Fade']
  },
  toggle: function(element, effect) {
    element = $(element);
    effect = (effect || 'appear').toLowerCase();
    var options = Object.extend({
      queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
    }, arguments[2] || { });
    Effect[element.visible() ? 
      Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
  }
};

Effect.DefaultOptions.transition = Effect.Transitions.sinoidal;

/* ------------- core effects ------------- */

Effect.ScopedQueue = Class.create(Enumerable, {
  initialize: function() {
    this.effects  = [];
    this.interval = null;    
  },
  _each: function(iterator) {
    this.effects._each(iterator);
  },
  add: function(effect) {
    var timestamp = new Date().getTime();
    
    var position = Object.isString(effect.options.queue) ? 
      effect.options.queue : effect.options.queue.position;
    
    switch(position) {
      case 'front':
        // move unstarted effects after this effect  
        this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
            e.startOn  += effect.finishOn;
            e.finishOn += effect.finishOn;
          });
        break;
      case 'with-last':
        timestamp = this.effects.pluck('startOn').max() || timestamp;
        break;
      case 'end':
        // start effect after last queued effect has finished
        timestamp = this.effects.pluck('finishOn').max() || timestamp;
        break;
    }
    
    effect.startOn  += timestamp;
    effect.finishOn += timestamp;

    if (!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
      this.effects.push(effect);
    
    if (!this.interval)
      this.interval = setInterval(this.loop.bind(this), 15);
  },
  remove: function(effect) {
    this.effects = this.effects.reject(function(e) { return e==effect });
    if (this.effects.length == 0) {
      clearInterval(this.interval);
      this.interval = null;
    }
  },
  loop: function() {
    var timePos = new Date().getTime();
    for(var i=0, len=this.effects.length;i<len;i++) 
      this.effects[i] && this.effects[i].loop(timePos);
  }
});

Effect.Queues = {
  instances: $H(),
  get: function(queueName) {
    if (!Object.isString(queueName)) return queueName;
    
    return this.instances.get(queueName) ||
      this.instances.set(queueName, new Effect.ScopedQueue());
  }
};
Effect.Queue = Effect.Queues.get('global');

Effect.Base = Class.create({
  position: null,
  start: function(options) {
    function codeForEvent(options,eventName){
      return (
        (options[eventName+'Internal'] ? 'this.options.'+eventName+'Internal(this);' : '') +
        (options[eventName] ? 'this.options.'+eventName+'(this);' : '')
      );
    }
    if (options && options.transition === false) options.transition = Effect.Transitions.linear;
    this.options      = Object.extend(Object.extend({ },Effect.DefaultOptions), options || { });
    this.currentFrame = 0;
    this.state        = 'idle';
    this.startOn      = this.options.delay*1000;
    this.finishOn     = this.startOn+(this.options.duration*1000);
    this.fromToDelta  = this.options.to-this.options.from;
    this.totalTime    = this.finishOn-this.startOn;
    this.totalFrames  = this.options.fps*this.options.duration;
    
    eval('this.render = function(pos){ '+
      'if (this.state=="idle"){this.state="running";'+
      codeForEvent(this.options,'beforeSetup')+
      (this.setup ? 'this.setup();':'')+ 
      codeForEvent(this.options,'afterSetup')+
      '};if (this.state=="running"){'+
      'pos=this.options.transition(pos)*'+this.fromToDelta+'+'+this.options.from+';'+
      'this.position=pos;'+
      codeForEvent(this.options,'beforeUpdate')+
      (this.update ? 'this.update(pos);':'')+
      codeForEvent(this.options,'afterUpdate')+
      '}}');
    
    this.event('beforeStart');
    if (!this.options.sync)
      Effect.Queues.get(Object.isString(this.options.queue) ? 
        'global' : this.options.queue.scope).add(this);
  },
  loop: function(timePos) {
    if (timePos >= this.startOn) {
      if (timePos >= this.finishOn) {
        this.render(1.0);
        this.cancel();
        this.event('beforeFinish');
        if (this.finish) this.finish(); 
        this.event('afterFinish');
        return;  
      }
      var pos   = (timePos - this.startOn) / this.totalTime,
          frame = (pos * this.totalFrames).round();
      if (frame > this.currentFrame) {
        this.render(pos);
        this.currentFrame = frame;
      }
    }
  },
  cancel: function() {
    if (!this.options.sync)
      Effect.Queues.get(Object.isString(this.options.queue) ? 
        'global' : this.options.queue.scope).remove(this);
    this.state = 'finished';
  },
  event: function(eventName) {
    if (this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
    if (this.options[eventName]) this.options[eventName](this);
  },
  inspect: function() {
    var data = $H();
    for(property in this)
      if (!Object.isFunction(this[property])) data.set(property, this[property]);
    return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
  }
});

Effect.Parallel = Class.create(Effect.Base, {
  initialize: function(effects) {
    this.effects = effects || [];
    this.start(arguments[1]);
  },
  update: function(position) {
    this.effects.invoke('render', position);
  },
  finish: function(position) {
    this.effects.each( function(effect) {
      effect.render(1.0);
      effect.cancel();
      effect.event('beforeFinish');
      if (effect.finish) effect.finish(position);
      effect.event('afterFinish');
    });
  }
});

Effect.Tween = Class.create(Effect.Base, {
  initialize: function(object, from, to) {
    object = Object.isString(object) ? $(object) : object;
    var args = $A(arguments), method = args.last(), 
      options = args.length == 5 ? args[3] : null;
    this.method = Object.isFunction(method) ? method.bind(object) :
      Object.isFunction(object[method]) ? object[method].bind(object) : 
      function(value) { object[method] = value };
    this.start(Object.extend({ from: from, to: to }, options || { }));
  },
  update: function(position) {
    this.method(position);
  }
});

Effect.Event = Class.create(Effect.Base, {
  initialize: function() {
    this.start(Object.extend({ duration: 0 }, arguments[0] || { }));
  },
  update: Prototype.emptyFunction
});

Effect.Opacity = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    // make this work on IE on elements without 'layout'
    if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
      this.element.setStyle({zoom: 1});
    var options = Object.extend({
      from: this.element.getOpacity() || 0.0,
      to:   1.0
    }, arguments[1] || { });
    this.start(options);
  },
  update: function(position) {
    this.element.setOpacity(position);
  }
});

Effect.Move = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      x:    0,
      y:    0,
      mode: 'relative'
    }, arguments[1] || { });
    this.start(options);
  },
  setup: function() {
    this.element.makePositioned();
    this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
    this.originalTop  = parseFloat(this.element.getStyle('top')  || '0');
    if (this.options.mode == 'absolute') {
      this.options.x = this.options.x - this.originalLeft;
      this.options.y = this.options.y - this.originalTop;
    }
  },
  update: function(position) {
    this.element.setStyle({
      left: (this.options.x  * position + this.originalLeft).round() + 'px',
      top:  (this.options.y  * position + this.originalTop).round()  + 'px'
    });
  }
});

// for backwards compatibility
Effect.MoveBy = function(element, toTop, toLeft) {
  return new Effect.Move(element, 
    Object.extend({ x: toLeft, y: toTop }, arguments[3] || { }));
};

Effect.Scale = Class.create(Effect.Base, {
  initialize: function(element, percent) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      scaleX: true,
      scaleY: true,
      scaleContent: true,
      scaleFromCenter: false,
      scaleMode: 'box',        // 'box' or 'contents' or { } with provided values
      scaleFrom: 100.0,
      scaleTo:   percent
    }, arguments[2] || { });
    this.start(options);
  },
  setup: function() {
    this.restoreAfterFinish = this.options.restoreAfterFinish || false;
    this.elementPositioning = this.element.getStyle('position');
    
    this.originalStyle = { };
    ['top','left','width','height','fontSize'].each( function(k) {
      this.originalStyle[k] = this.element.style[k];
    }.bind(this));
      
    this.originalTop  = this.element.offsetTop;
    this.originalLeft = this.element.offsetLeft;
    
    var fontSize = this.element.getStyle('font-size') || '100%';
    ['em','px','%','pt'].each( function(fontSizeType) {
      if (fontSize.indexOf(fontSizeType)>0) {
        this.fontSize     = parseFloat(fontSize);
        this.fontSizeType = fontSizeType;
      }
    }.bind(this));
    
    this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;
    
    this.dims = null;
    if (this.options.scaleMode=='box')
      this.dims = [this.element.offsetHeight, this.element.offsetWidth];
    if (/^content/.test(this.options.scaleMode))
      this.dims = [this.element.scrollHeight, this.element.scrollWidth];
    if (!this.dims)
      this.dims = [this.options.scaleMode.originalHeight,
                   this.options.scaleMode.originalWidth];
  },
  update: function(position) {
    var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
    if (this.options.scaleContent && this.fontSize)
      this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
    this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
  },
  finish: function(position) {
    if (this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
  },
  setDimensions: function(height, width) {
    var d = { };
    if (this.options.scaleX) d.width = width.round() + 'px';
    if (this.options.scaleY) d.height = height.round() + 'px';
    if (this.options.scaleFromCenter) {
      var topd  = (height - this.dims[0])/2;
      var leftd = (width  - this.dims[1])/2;
      if (this.elementPositioning == 'absolute') {
        if (this.options.scaleY) d.top = this.originalTop-topd + 'px';
        if (this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
      } else {
        if (this.options.scaleY) d.top = -topd + 'px';
        if (this.options.scaleX) d.left = -leftd + 'px';
      }
    }
    this.element.setStyle(d);
  }
});

Effect.Highlight = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || { });
    this.start(options);
  },
  setup: function() {
    // Prevent executing on elements not in the layout flow
    if (this.element.getStyle('display')=='none') { this.cancel(); return; }
    // Disable background image during the effect
    this.oldStyle = { };
    if (!this.options.keepBackgroundImage) {
      this.oldStyle.backgroundImage = this.element.getStyle('background-image');
      this.element.setStyle({backgroundImage: 'none'});
    }
    if (!this.options.endcolor)
      this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
    if (!this.options.restorecolor)
      this.options.restorecolor = this.element.getStyle('background-color');
    // init color calculations
    this._base  = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
    this._delta = $R(0,2).map(function(i){ return parseInt(this.options.endcolor.slice(i*2+1,i*2+3),16)-this._base[i] }.bind(this));
  },
  update: function(position) {
    this.element.setStyle({backgroundColor: $R(0,2).inject('#',function(m,v,i){
      return m+((this._base[i]+(this._delta[i]*position)).round().toColorPart()); }.bind(this)) });
  },
  finish: function() {
    this.element.setStyle(Object.extend(this.oldStyle, {
      backgroundColor: this.options.restorecolor
    }));
  }
});

Effect.ScrollTo = function(element) {
  var options = arguments[1] || { },
    scrollOffsets = document.viewport.getScrollOffsets(),
    elementOffsets = $(element).cumulativeOffset(),
    max = (window.height || document.body.scrollHeight) - document.viewport.getHeight();  

  if (options.offset) elementOffsets[1] += options.offset;

  return new Effect.Tween(null,
    scrollOffsets.top,
    elementOffsets[1] > max ? max : elementOffsets[1],
    options,
    function(p){ scrollTo(scrollOffsets.left, p.round()) }
  );
};

/* ------------- combination effects ------------- */

Effect.Fade = function(element) {
  element = $(element);
  var oldOpacity = element.getInlineOpacity();
  var options = Object.extend({
    from: element.getOpacity() || 1.0,
    to:   0.0,
    afterFinishInternal: function(effect) { 
      if (effect.options.to!=0) return;
      effect.element.hide().setStyle({opacity: oldOpacity}); 
    }
  }, arguments[1] || { });
  return new Effect.Opacity(element,options);
};

Effect.Appear = function(element) {
  element = $(element);
  var options = Object.extend({
  from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
  to:   1.0,
  // force Safari to render floated elements properly
  afterFinishInternal: function(effect) {
    effect.element.forceRerendering();
  },
  beforeSetup: function(effect) {
    effect.element.setOpacity(effect.options.from).show(); 
  }}, arguments[1] || { });
  return new Effect.Opacity(element,options);
};

Effect.Puff = function(element) {
  element = $(element);
  var oldStyle = { 
    opacity: element.getInlineOpacity(), 
    position: element.getStyle('position'),
    top:  element.style.top,
    left: element.style.left,
    width: element.style.width,
    height: element.style.height
  };
  return new Effect.Parallel(
   [ new Effect.Scale(element, 200, 
      { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }), 
     new Effect.Opacity(element, { sync: true, to: 0.0 } ) ], 
     Object.extend({ duration: 1.0, 
      beforeSetupInternal: function(effect) {
        Position.absolutize(effect.effects[0].element)
      },
      afterFinishInternal: function(effect) {
         effect.effects[0].element.hide().setStyle(oldStyle); }
     }, arguments[1] || { })
   );
};

Effect.BlindUp = function(element) {
  element = $(element);
  element.makeClipping();
  return new Effect.Scale(element, 0,
    Object.extend({ scaleContent: false, 
      scaleX: false, 
      restoreAfterFinish: true,
      afterFinishInternal: function(effect) {
        effect.element.hide().undoClipping();
      } 
    }, arguments[1] || { })
  );
};

Effect.BlindDown = function(element) {
  element = $(element);
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({ 
    scaleContent: false, 
    scaleX: false,
    scaleFrom: 0,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makeClipping().setStyle({height: '0px'}).show(); 
    },  
    afterFinishInternal: function(effect) {
      effect.element.undoClipping();
    }
  }, arguments[1] || { }));
};

Effect.SwitchOff = function(element) {
  element = $(element);
  var oldOpacity = element.getInlineOpacity();
  return new Effect.Appear(element, Object.extend({
    duration: 0.4,
    from: 0,
    transition: Effect.Transitions.flicker,
    afterFinishInternal: function(effect) {
      new Effect.Scale(effect.element, 1, { 
        duration: 0.3, scaleFromCenter: true,
        scaleX: false, scaleContent: false, restoreAfterFinish: true,
        beforeSetup: function(effect) { 
          effect.element.makePositioned().makeClipping();
        },
        afterFinishInternal: function(effect) {
          effect.element.hide().undoClipping().undoPositioned().setStyle({opacity: oldOpacity});
        }
      })
    }
  }, arguments[1] || { }));
};

Effect.DropOut = function(element) {
  element = $(element);
  var oldStyle = {
    top: element.getStyle('top'),
    left: element.getStyle('left'),
    opacity: element.getInlineOpacity() };
  return new Effect.Parallel(
    [ new Effect.Move(element, {x: 0, y: 100, sync: true }), 
      new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
    Object.extend(
      { duration: 0.5,
        beforeSetup: function(effect) {
          effect.effects[0].element.makePositioned(); 
        },
        afterFinishInternal: function(effect) {
          effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
        } 
      }, arguments[1] || { }));
};

Effect.Shake = function(element) {
  element = $(element);
  var options = Object.extend({
    distance: 20,
    duration: 0.5
  }, arguments[1] || {});
  var distance = parseFloat(options.distance);
  var split = parseFloat(options.duration) / 10.0;
  var oldStyle = {
    top: element.getStyle('top'),
    left: element.getStyle('left') };
    return new Effect.Move(element,
      { x:  distance, y: 0, duration: split, afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance, y: 0, duration: split, afterFinishInternal: function(effect) {
        effect.element.undoPositioned().setStyle(oldStyle);
  }}) }}) }}) }}) }}) }});
};

Effect.SlideDown = function(element) {
  element = $(element).cleanWhitespace();
  // SlideDown need to have the content of the element wrapped in a container element with fixed height!
  var oldInnerBottom = element.down().getStyle('bottom');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({ 
    scaleContent: false, 
    scaleX: false, 
    scaleFrom: window.opera ? 0 : 1,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makePositioned();
      effect.element.down().makePositioned();
      if (window.opera) effect.element.setStyle({top: ''});
      effect.element.makeClipping().setStyle({height: '0px'}).show(); 
    },
    afterUpdateInternal: function(effect) {
      effect.element.down().setStyle({bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' }); 
    },
    afterFinishInternal: function(effect) {
      effect.element.undoClipping().undoPositioned();
      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom}); }
    }, arguments[1] || { })
  );
};

Effect.SlideUp = function(element) {
  element = $(element).cleanWhitespace();
  var oldInnerBottom = element.down().getStyle('bottom');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, window.opera ? 0 : 1,
   Object.extend({ scaleContent: false, 
    scaleX: false, 
    scaleMode: 'box',
    scaleFrom: 100,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makePositioned();
      effect.element.down().makePositioned();
      if (window.opera) effect.element.setStyle({top: ''});
      effect.element.makeClipping().show();
    },  
    afterUpdateInternal: function(effect) {
      effect.element.down().setStyle({bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' });
    },
    afterFinishInternal: function(effect) {
      effect.element.hide().undoClipping().undoPositioned();
      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom});
    }
   }, arguments[1] || { })
  );
};

// Bug in opera makes the TD containing this element expand for a instance after finish 
Effect.Squish = function(element) {
  return new Effect.Scale(element, window.opera ? 1 : 0, { 
    restoreAfterFinish: true,
    beforeSetup: function(effect) {
      effect.element.makeClipping(); 
    },  
    afterFinishInternal: function(effect) {
      effect.element.hide().undoClipping(); 
    }
  });
};

Effect.Grow = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransition: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.full
  }, arguments[1] || { });
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: element.getInlineOpacity() };

  var dims = element.getDimensions();    
  var initialMoveX, initialMoveY;
  var moveX, moveY;
  
  switch (options.direction) {
    case 'top-left':
      initialMoveX = initialMoveY = moveX = moveY = 0; 
      break;
    case 'top-right':
      initialMoveX = dims.width;
      initialMoveY = moveY = 0;
      moveX = -dims.width;
      break;
    case 'bottom-left':
      initialMoveX = moveX = 0;
      initialMoveY = dims.height;
      moveY = -dims.height;
      break;
    case 'bottom-right':
      initialMoveX = dims.width;
      initialMoveY = dims.height;
      moveX = -dims.width;
      moveY = -dims.height;
      break;
    case 'center':
      initialMoveX = dims.width / 2;
      initialMoveY = dims.height / 2;
      moveX = -dims.width / 2;
      moveY = -dims.height / 2;
      break;
  }
  
  return new Effect.Move(element, {
    x: initialMoveX,
    y: initialMoveY,
    duration: 0.01, 
    beforeSetup: function(effect) {
      effect.element.hide().makeClipping().makePositioned();
    },
    afterFinishInternal: function(effect) {
      new Effect.Parallel(
        [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
          new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
          new Effect.Scale(effect.element, 100, {
            scaleMode: { originalHeight: dims.height, originalWidth: dims.width }, 
            sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
        ], Object.extend({
             beforeSetup: function(effect) {
               effect.effects[0].element.setStyle({height: '0px'}).show(); 
             },
             afterFinishInternal: function(effect) {
               effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle); 
             }
           }, options)
      )
    }
  });
};

Effect.Shrink = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransition: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.none
  }, arguments[1] || { });
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: element.getInlineOpacity() };

  var dims = element.getDimensions();
  var moveX, moveY;
  
  switch (options.direction) {
    case 'top-left':
      moveX = moveY = 0;
      break;
    case 'top-right':
      moveX = dims.width;
      moveY = 0;
      break;
    case 'bottom-left':
      moveX = 0;
      moveY = dims.height;
      break;
    case 'bottom-right':
      moveX = dims.width;
      moveY = dims.height;
      break;
    case 'center':  
      moveX = dims.width / 2;
      moveY = dims.height / 2;
      break;
  }
  
  return new Effect.Parallel(
    [ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
      new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
      new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
    ], Object.extend({            
         beforeStartInternal: function(effect) {
           effect.effects[0].element.makePositioned().makeClipping(); 
         },
         afterFinishInternal: function(effect) {
           effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle); }
       }, options)
  );
};

Effect.Pulsate = function(element) {
  element = $(element);
  var options    = arguments[1] || { };
  var oldOpacity = element.getInlineOpacity();
  var transition = options.transition || Effect.Transitions.sinoidal;
  var reverser   = function(pos){ return transition(1-Effect.Transitions.pulse(pos, options.pulses)) };
  reverser.bind(transition);
  return new Effect.Opacity(element, 
    Object.extend(Object.extend({  duration: 2.0, from: 0,
      afterFinishInternal: function(effect) { effect.element.setStyle({opacity: oldOpacity}); }
    }, options), {transition: reverser}));
};

Effect.Fold = function(element) {
  element = $(element);
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    width: element.style.width,
    height: element.style.height };
  element.makeClipping();
  return new Effect.Scale(element, 5, Object.extend({   
    scaleContent: false,
    scaleX: false,
    afterFinishInternal: function(effect) {
    new Effect.Scale(element, 1, { 
      scaleContent: false, 
      scaleY: false,
      afterFinishInternal: function(effect) {
        effect.element.hide().undoClipping().setStyle(oldStyle);
      } });
  }}, arguments[1] || { }));
};

Effect.Morph = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      style: { }
    }, arguments[1] || { });
    
    if (!Object.isString(options.style)) this.style = $H(options.style);
    else {
      if (options.style.include(':'))
        this.style = options.style.parseStyle();
      else {
        this.element.addClassName(options.style);
        this.style = $H(this.element.getStyles());
        this.element.removeClassName(options.style);
        var css = this.element.getStyles();
        this.style = this.style.reject(function(style) {
          return style.value == css[style.key];
        });
        options.afterFinishInternal = function(effect) {
          effect.element.addClassName(effect.options.style);
          effect.transforms.each(function(transform) {
            effect.element.style[transform.style] = '';
          });
        }
      }
    }
    this.start(options);
  },
  
  setup: function(){
    function parseColor(color){
      if (!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
      color = color.parseColor();
      return $R(0,2).map(function(i){
        return parseInt( color.slice(i*2+1,i*2+3), 16 ) 
      });
    }
    this.transforms = this.style.map(function(pair){
      var property = pair[0], value = pair[1], unit = null;

      if (value.parseColor('#zzzzzz') != '#zzzzzz') {
        value = value.parseColor();
        unit  = 'color';
      } else if (property == 'opacity') {
        value = parseFloat(value);
        if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
          this.element.setStyle({zoom: 1});
      } else if (Element.CSS_LENGTH.test(value)) {
          var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
          value = parseFloat(components[1]);
          unit = (components.length == 3) ? components[2] : null;
      }

      var originalValue = this.element.getStyle(property);
      return { 
        style: property.camelize(), 
        originalValue: unit=='color' ? parseColor(originalValue) : parseFloat(originalValue || 0), 
        targetValue: unit=='color' ? parseColor(value) : value,
        unit: unit
      };
    }.bind(this)).reject(function(transform){
      return (
        (transform.originalValue == transform.targetValue) ||
        (
          transform.unit != 'color' &&
          (isNaN(transform.originalValue) || isNaN(transform.targetValue))
        )
      )
    });
  },
  update: function(position) {
    var style = { }, transform, i = this.transforms.length;
    while(i--)
      style[(transform = this.transforms[i]).style] = 
        transform.unit=='color' ? '#'+
          (Math.round(transform.originalValue[0]+
            (transform.targetValue[0]-transform.originalValue[0])*position)).toColorPart() +
          (Math.round(transform.originalValue[1]+
            (transform.targetValue[1]-transform.originalValue[1])*position)).toColorPart() +
          (Math.round(transform.originalValue[2]+
            (transform.targetValue[2]-transform.originalValue[2])*position)).toColorPart() :
        (transform.originalValue +
          (transform.targetValue - transform.originalValue) * position).toFixed(3) + 
            (transform.unit === null ? '' : transform.unit);
    this.element.setStyle(style, true);
  }
});

Effect.Transform = Class.create({
  initialize: function(tracks){
    this.tracks  = [];
    this.options = arguments[1] || { };
    this.addTracks(tracks);
  },
  addTracks: function(tracks){
    tracks.each(function(track){
      track = $H(track);
      var data = track.values().first();
      this.tracks.push($H({
        ids:     track.keys().first(),
        effect:  Effect.Morph,
        options: { style: data }
      }));
    }.bind(this));
    return this;
  },
  play: function(){
    return new Effect.Parallel(
      this.tracks.map(function(track){
        var ids = track.get('ids'), effect = track.get('effect'), options = track.get('options');
        var elements = [$(ids) || $$(ids)].flatten();
        return elements.map(function(e){ return new effect(e, Object.extend({ sync:true }, options)) });
      }).flatten(),
      this.options
    );
  }
});

Element.CSS_PROPERTIES = $w(
  'backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' + 
  'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
  'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
  'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
  'fontSize fontWeight height left letterSpacing lineHeight ' +
  'marginBottom marginLeft marginRight marginTop markerOffset maxHeight '+
  'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
  'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
  'right textIndent top width wordSpacing zIndex');
  
Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;

String.__parseStyleElement = document.createElement('div');
String.prototype.parseStyle = function(){
  var style, styleRules = $H();
  if (Prototype.Browser.WebKit)
    style = new Element('div',{style:this}).style;
  else {
    String.__parseStyleElement.innerHTML = '<div style="' + this + '"></div>';
    style = String.__parseStyleElement.childNodes[0].style;
  }
  
  Element.CSS_PROPERTIES.each(function(property){
    if (style[property]) styleRules.set(property, style[property]); 
  });
  
  if (Prototype.Browser.IE && this.include('opacity'))
    styleRules.set('opacity', this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1]);

  return styleRules;
};

if (document.defaultView && document.defaultView.getComputedStyle) {
  Element.getStyles = function(element) {
    var css = document.defaultView.getComputedStyle($(element), null);
    return Element.CSS_PROPERTIES.inject({ }, function(styles, property) {
      styles[property] = css[property];
      return styles;
    });
  };
} else {
  Element.getStyles = function(element) {
    element = $(element);
    var css = element.currentStyle, styles;
    styles = Element.CSS_PROPERTIES.inject({ }, function(hash, property) {
      hash.set(property, css[property]);
      return hash;
    });
    if (!styles.opacity) styles.set('opacity', element.getOpacity());
    return styles;
  };
};

Effect.Methods = {
  morph: function(element, style) {
    element = $(element);
    new Effect.Morph(element, Object.extend({ style: style }, arguments[2] || { }));
    return element;
  },
  visualEffect: function(element, effect, options) {
    element = $(element)
    var s = effect.dasherize().camelize(), klass = s.charAt(0).toUpperCase() + s.substring(1);
    new Effect[klass](element, options);
    return element;
  },
  highlight: function(element, options) {
    element = $(element);
    new Effect.Highlight(element, options);
    return element;
  }
};

$w('fade appear grow shrink fold blindUp blindDown slideUp slideDown '+
  'pulsate shake puff squish switchOff dropOut').each(
  function(effect) { 
    Effect.Methods[effect] = function(element, options){
      element = $(element);
      Effect[effect.charAt(0).toUpperCase() + effect.substring(1)](element, options);
      return element;
    }
  }
);

$w('getInlineOpacity forceRerendering setContentZoom collectTextNodes collectTextNodesIgnoreClass getStyles').each( 
  function(f) { Effect.Methods[f] = Element[f]; }
);

Element.addMethods(Effect.Methods);

if(typeof Effect == 'undefined')
  throw("controls.js requires including script.aculo.us' effects.js library");

var Autocompleter = { }
Autocompleter.Base = Class.create({
  baseInitialize: function(element, update, options) {
    element          = $(element)
    this.element     = element; 
    this.update      = $(update);  
    this.hasFocus    = false; 
    this.changed     = false; 
    this.active      = false; 
    this.index       = 0;     
    this.entryCount  = 0;
    this.oldElementValue = this.element.value;

    if(this.setOptions)
      this.setOptions(options);
    else
      this.options = options || { };

    this.options.paramName    = this.options.paramName || this.element.name;
    this.options.tokens       = this.options.tokens || [];
    this.options.frequency    = this.options.frequency || 0.4;
    this.options.minChars     = this.options.minChars || 1;
    this.options.onShow       = this.options.onShow || 
      function(element, update){ 
        if(!update.style.position || update.style.position=='absolute') {
          update.style.position = 'absolute';
          Position.clone(element, update, {
            setHeight: false, 
            offsetTop: element.offsetHeight
          });
        }
        Effect.Appear(update,{duration:0.15});
      };
    this.options.onHide = this.options.onHide || 
      function(element, update){ new Effect.Fade(update,{duration:0.15}) };

    if(typeof(this.options.tokens) == 'string') 
      this.options.tokens = new Array(this.options.tokens);
    // Force carriage returns as token delimiters anyway
    if (!this.options.tokens.include('\n'))
      this.options.tokens.push('\n');

    this.observer = null;
    
    this.element.setAttribute('autocomplete','off');

    Element.hide(this.update);

    Event.observe(this.element, 'blur', this.onBlur.bindAsEventListener(this));
    Event.observe(this.element, 'keypress', this.onKeyPress.bindAsEventListener(this));
  },

  show: function() {
    if(Element.getStyle(this.update, 'display')=='none') this.options.onShow(this.element, this.update);
    if(!this.iefix && 
      (Prototype.Browser.IE) &&
      (Element.getStyle(this.update, 'position')=='absolute')) {
      new Insertion.After(this.update, 
       '<iframe id="' + this.update.id + '_iefix" '+
       'style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' +
       'src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
      this.iefix = $(this.update.id+'_iefix');
    }
    if(this.iefix) setTimeout(this.fixIEOverlapping.bind(this), 50);
  },
  
  fixIEOverlapping: function() {
    Position.clone(this.update, this.iefix, {setTop:(!this.update.style.height)});
    this.iefix.style.zIndex = 1;
    this.update.style.zIndex = 2;
    Element.show(this.iefix);
  },

  hide: function() {
    this.stopIndicator();
    if(Element.getStyle(this.update, 'display')!='none') this.options.onHide(this.element, this.update);
    if(this.iefix) Element.hide(this.iefix);
  },

  startIndicator: function() {
    if(this.options.indicator) Element.show(this.options.indicator);
  },

  stopIndicator: function() {
    if(this.options.indicator) Element.hide(this.options.indicator);
  },

  onKeyPress: function(event) {
    if(this.active)
      switch(event.keyCode) {
       case Event.KEY_TAB:
       case Event.KEY_RETURN:
         this.selectEntry();
         Event.stop(event);
       case Event.KEY_ESC:
         this.hide();
         this.active = false;
         Event.stop(event);
         return;
       case Event.KEY_LEFT:
       case Event.KEY_RIGHT:
         return;
       case Event.KEY_UP:
         this.markPrevious();
         this.render();
         if(Prototype.Browser.WebKit) Event.stop(event);
         return;
       case Event.KEY_DOWN:
         this.markNext();
         this.render();
         if(Prototype.Browser.WebKit) Event.stop(event);
         return;
      }
     else 
       if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN || 
         (Prototype.Browser.WebKit > 0 && event.keyCode == 0)) return;

    this.changed = true;
    this.hasFocus = true;

    if(this.observer) clearTimeout(this.observer);
      this.observer = 
        setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);
  },

  activate: function() {
    this.changed = false;
    this.hasFocus = true;
    this.getUpdatedChoices();
  },

  onHover: function(event) {
    var element = Event.findElement(event, 'LI');
    if(this.index != element.autocompleteIndex) 
    {
        this.index = element.autocompleteIndex;
        this.render();
    }
    Event.stop(event);
  },
  
  onClick: function(event) {
    var element = Event.findElement(event, 'LI');
    this.index = element.autocompleteIndex;
    this.selectEntry();
    this.hide();
  },
  
  onBlur: function(event) {
    // needed to make click events working
    setTimeout(this.hide.bind(this), 250);
    this.hasFocus = false;
    this.active = false;     
  }, 
  
  render: function() {
    if(this.entryCount > 0) {
      for (var i = 0; i < this.entryCount; i++)
        this.index==i ? 
          Element.addClassName(this.getEntry(i),"selected") : 
          Element.removeClassName(this.getEntry(i),"selected");
      if(this.hasFocus) { 
        this.show();
        this.active = true;
      }
    } else {
      this.active = false;
      this.hide();
    }
  },
  
  markPrevious: function() {
    if(this.index > 0) this.index--
      else this.index = this.entryCount-1;
    this.getEntry(this.index).scrollIntoView(true);
  },
  
  markNext: function() {
    if(this.index < this.entryCount-1) this.index++
      else this.index = 0;
    this.getEntry(this.index).scrollIntoView(false);
  },
  
  getEntry: function(index) {
    return this.update.firstChild.childNodes[index];
  },
  
  getCurrentEntry: function() {
    return this.getEntry(this.index);
  },
  
  selectEntry: function() {
    this.active = false;
    this.updateElement(this.getCurrentEntry());
  },

  updateElement: function(selectedElement) {
    if (this.options.updateElement) {
      this.options.updateElement(selectedElement);
      return;
    }
    var value = '';
    if (this.options.select) {
      var nodes = $(selectedElement).select('.' + this.options.select) || [];
      if(nodes.length>0) value = Element.collectTextNodes(nodes[0], this.options.select);
    } else
      value = Element.collectTextNodesIgnoreClass(selectedElement, 'informal');
    
    var bounds = this.getTokenBounds();
    if (bounds[0] != -1) {
      var newValue = this.element.value.substr(0, bounds[0]);
      var whitespace = this.element.value.substr(bounds[0]).match(/^\s+/);
      if (whitespace)
        newValue += whitespace[0];
      this.element.value = newValue + value + this.element.value.substr(bounds[1]);
    } else {
      this.element.value = value;
    }
    this.oldElementValue = this.element.value;
    this.element.focus();
    
    if (this.options.afterUpdateElement)
      this.options.afterUpdateElement(this.element, selectedElement);
  },

  updateChoices: function(choices) {
    if(!this.changed && this.hasFocus) {
      this.update.innerHTML = choices;
      Element.cleanWhitespace(this.update);
      Element.cleanWhitespace(this.update.down());

      if(this.update.firstChild && this.update.down().childNodes) {
        this.entryCount = 
          this.update.down().childNodes.length;
        for (var i = 0; i < this.entryCount; i++) {
          var entry = this.getEntry(i);
          entry.autocompleteIndex = i;
          this.addObservers(entry);
        }
      } else { 
        this.entryCount = 0;
      }

      this.stopIndicator();
      this.index = 0;
      
      if(this.entryCount==1 && this.options.autoSelect) {
        this.selectEntry();
        this.hide();
      } else {
        this.render();
      }
    }
  },

  addObservers: function(element) {
    Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this));
    Event.observe(element, "click", this.onClick.bindAsEventListener(this));
  },

  onObserverEvent: function() {
    this.changed = false;   
    this.tokenBounds = null;
    if(this.getToken().length>=this.options.minChars) {
      this.getUpdatedChoices();
    } else {
      this.active = false;
      this.hide();
    }
    this.oldElementValue = this.element.value;
  },

  getToken: function() {
    var bounds = this.getTokenBounds();
    return this.element.value.substring(bounds[0], bounds[1]).strip();
  },

  getTokenBounds: function() {
    if (null != this.tokenBounds) return this.tokenBounds;
    var value = this.element.value;
    if (value.strip().empty()) return [-1, 0];
    var diff = arguments.callee.getFirstDifferencePos(value, this.oldElementValue);
    var offset = (diff == this.oldElementValue.length ? 1 : 0);
    var prevTokenPos = -1, nextTokenPos = value.length;
    var tp;
    for (var index = 0, l = this.options.tokens.length; index < l; ++index) {
      tp = value.lastIndexOf(this.options.tokens[index], diff + offset - 1);
      if (tp > prevTokenPos) prevTokenPos = tp;
      tp = value.indexOf(this.options.tokens[index], diff + offset);
      if (-1 != tp && tp < nextTokenPos) nextTokenPos = tp;
    }
    return (this.tokenBounds = [prevTokenPos + 1, nextTokenPos]);
  }
});

Autocompleter.Base.prototype.getTokenBounds.getFirstDifferencePos = function(newS, oldS) {
  var boundary = Math.min(newS.length, oldS.length);
  for (var index = 0; index < boundary; ++index)
    if (newS[index] != oldS[index])
      return index;
  return boundary;
};

Ajax.Autocompleter = Class.create(Autocompleter.Base, {
  initialize: function(element, update, url, options) {
    this.baseInitialize(element, update, options);
    this.options.asynchronous  = true;
    this.options.onComplete    = this.onComplete.bind(this);
    this.options.defaultParams = this.options.parameters || null;
    this.url                   = url;
  },

  getUpdatedChoices: function() {
    this.startIndicator();
    
    var entry = encodeURIComponent(this.options.paramName) + '=' + 
      encodeURIComponent(this.getToken());

    this.options.parameters = this.options.callback ?
      this.options.callback(this.element, entry) : entry;

    if(this.options.defaultParams) 
      this.options.parameters += '&' + this.options.defaultParams;
    
    new Ajax.Request(this.url, this.options);
  },

  onComplete: function(request) {
    this.updateChoices(request.responseText);
  }
});

// The local array autocompleter. Used when you'd prefer to
// inject an array of autocompletion options into the page, rather
// than sending out Ajax queries, which can be quite slow sometimes.
//
// The constructor takes four parameters. The first two are, as usual,
// the id of the monitored textbox, and id of the autocompletion menu.
// The third is the array you want to autocomplete from, and the fourth
// is the options block.
//
// Extra local autocompletion options:
// - choices - How many autocompletion choices to offer
//
// - partialSearch - If false, the autocompleter will match entered
//                    text only at the beginning of strings in the 
//                    autocomplete array. Defaults to true, which will
//                    match text at the beginning of any *word* in the
//                    strings in the autocomplete array. If you want to
//                    search anywhere in the string, additionally set
//                    the option fullSearch to true (default: off).
//
// - fullSsearch - Search anywhere in autocomplete array strings.
//
// - partialChars - How many characters to enter before triggering
//                   a partial match (unlike minChars, which defines
//                   how many characters are required to do any match
//                   at all). Defaults to 2.
//
// - ignoreCase - Whether to ignore case when autocompleting.
//                 Defaults to true.
//
// It's possible to pass in a custom function as the 'selector' 
// option, if you prefer to write your own autocompletion logic.
// In that case, the other options above will not apply unless
// you support them.

Autocompleter.Local = Class.create(Autocompleter.Base, {
  initialize: function(element, update, array, options) {
    this.baseInitialize(element, update, options);
    this.options.array = array;
  },

  getUpdatedChoices: function() {
    this.updateChoices(this.options.selector(this));
  },

  setOptions: function(options) {
    this.options = Object.extend({
      choices: 10,
      partialSearch: true,
      partialChars: 2,
      ignoreCase: true,
      fullSearch: false,
      selector: function(instance) {
        var ret       = []; // Beginning matches
        var partial   = []; // Inside matches
        var entry     = instance.getToken();
        var count     = 0;

        for (var i = 0; i < instance.options.array.length &&  
          ret.length < instance.options.choices ; i++) { 

          var elem = instance.options.array[i];
          var foundPos = instance.options.ignoreCase ? 
            elem.toLowerCase().indexOf(entry.toLowerCase()) : 
            elem.indexOf(entry);

          while (foundPos != -1) {
            if (foundPos == 0 && elem.length != entry.length) { 
              ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" + 
                elem.substr(entry.length) + "</li>");
              break;
            } else if (entry.length >= instance.options.partialChars && 
              instance.options.partialSearch && foundPos != -1) {
              if (instance.options.fullSearch || /\s/.test(elem.substr(foundPos-1,1))) {
                partial.push("<li>" + elem.substr(0, foundPos) + "<strong>" +
                  elem.substr(foundPos, entry.length) + "</strong>" + elem.substr(
                  foundPos + entry.length) + "</li>");
                break;
              }
            }

            foundPos = instance.options.ignoreCase ? 
              elem.toLowerCase().indexOf(entry.toLowerCase(), foundPos + 1) : 
              elem.indexOf(entry, foundPos + 1);

          }
        }
        if (partial.length)
          ret = ret.concat(partial.slice(0, instance.options.choices - ret.length))
        return "<ul>" + ret.join('') + "</ul>";
      }
    }, options || { });
  }
});

// AJAX in-place editor and collection editor
// Full rewrite by Christophe Porteneuve <tdd@tddsworld.com> (April 2007).

// Use this if you notice weird scrolling problems on some browsers,
// the DOM might be a bit confused when this gets called so do this
// waits 1 ms (with setTimeout) until it does the activation
Field.scrollFreeActivate = function(field) {
  setTimeout(function() {
    Field.activate(field);
  }, 1);
}

Ajax.InPlaceEditor = Class.create({
  initialize: function(element, url, options) {
    this.url = url;
    this.element = element = $(element);
    this.prepareOptions();
    this._controls = { };
    arguments.callee.dealWithDeprecatedOptions(options); // DEPRECATION LAYER!!!
    Object.extend(this.options, options || { });
    if (!this.options.formId && this.element.id) {
      this.options.formId = this.element.id + '-inplaceeditor';
      if ($(this.options.formId))
        this.options.formId = '';
    }
    if (this.options.externalControl)
      this.options.externalControl = $(this.options.externalControl);
    if (!this.options.externalControl)
      this.options.externalControlOnly = false;
    this._originalBackground = this.element.getStyle('background-color') || 'transparent';
    this.element.title = this.options.clickToEditText;
    this._boundCancelHandler = this.handleFormCancellation.bind(this);
    this._boundComplete = (this.options.onComplete || Prototype.emptyFunction).bind(this);
    this._boundFailureHandler = this.handleAJAXFailure.bind(this);
    this._boundSubmitHandler = this.handleFormSubmission.bind(this);
    this._boundWrapperHandler = this.wrapUp.bind(this);
    this.registerListeners();
  },
  checkForEscapeOrReturn: function(e) {
    if (!this._editing || e.ctrlKey || e.altKey || e.shiftKey) return;
    if (Event.KEY_ESC == e.keyCode)
      this.handleFormCancellation(e);
    else if (Event.KEY_RETURN == e.keyCode)
      this.handleFormSubmission(e);
  },
  createControl: function(mode, handler, extraClasses) {
    var control = this.options[mode + 'Control'];
    var text = this.options[mode + 'Text'];
    if ('button' == control) {
      var btn = document.createElement('input');
      btn.type = 'submit';
      btn.value = text;
      btn.className = 'editor_' + mode + '_button';
      if ('cancel' == mode)
        btn.onclick = this._boundCancelHandler;
      this._form.appendChild(btn);
      this._controls[mode] = btn;
    } else if ('link' == control) {
      var link = document.createElement('a');
      link.href = '#';
      link.appendChild(document.createTextNode(text));
      link.onclick = 'cancel' == mode ? this._boundCancelHandler : this._boundSubmitHandler;
      link.className = 'editor_' + mode + '_link';
      if (extraClasses)
        link.className += ' ' + extraClasses;
      this._form.appendChild(link);
      this._controls[mode] = link;
    }
  },
  createEditField: function() {
    var text = (this.options.loadTextURL ? this.options.loadingText : this.getText());
    var fld;
    if (1 >= this.options.rows && !/\r|\n/.test(this.getText())) {
      fld = document.createElement('input');
      fld.type = 'text';
      var size = this.options.size || this.options.cols || 0;
      if (0 < size) fld.size = size;
    } else {
      fld = document.createElement('textarea');
      fld.rows = (1 >= this.options.rows ? this.options.autoRows : this.options.rows);
      fld.cols = this.options.cols || 40;
    }
    fld.name = this.options.paramName;
    fld.value = text; // No HTML breaks conversion anymore
    fld.className = 'editor_field';
    if (this.options.submitOnBlur)
      fld.onblur = this._boundSubmitHandler;
    this._controls.editor = fld;
    if (this.options.loadTextURL)
      this.loadExternalText();
    this._form.appendChild(this._controls.editor);
  },
  createForm: function() {
    var ipe = this;
    function addText(mode, condition) {
      var text = ipe.options['text' + mode + 'Controls'];
      if (!text || condition === false) return;
      ipe._form.appendChild(document.createTextNode(text));
    };
    this._form = $(document.createElement('form'));
    this._form.id = this.options.formId;
    this._form.addClassName(this.options.formClassName);
    this._form.onsubmit = this._boundSubmitHandler;
    this.createEditField();
    if ('textarea' == this._controls.editor.tagName.toLowerCase())
      this._form.appendChild(document.createElement('br'));
    if (this.options.onFormCustomization)
      this.options.onFormCustomization(this, this._form);
    addText('Before', this.options.okControl || this.options.cancelControl);
    this.createControl('ok', this._boundSubmitHandler);
    addText('Between', this.options.okControl && this.options.cancelControl);
    this.createControl('cancel', this._boundCancelHandler, 'editor_cancel');
    addText('After', this.options.okControl || this.options.cancelControl);
  },
  destroy: function() {
    if (this._oldInnerHTML)
      this.element.innerHTML = this._oldInnerHTML;
    this.leaveEditMode();
    this.unregisterListeners();
  },
  enterEditMode: function(e) {
    if (this._saving || this._editing) return;
    this._editing = true;
    this.triggerCallback('onEnterEditMode');
    if (this.options.externalControl)
      this.options.externalControl.hide();
    this.element.hide();
    this.createForm();
    this.element.parentNode.insertBefore(this._form, this.element);
    if (!this.options.loadTextURL)
      this.postProcessEditField();
    if (e) Event.stop(e);
  },
  enterHover: function(e) {
    if (this.options.hoverClassName)
      this.element.addClassName(this.options.hoverClassName);
    if (this._saving) return;
    this.triggerCallback('onEnterHover');
  },
  getText: function() {
    return this.element.innerHTML;
  },
  handleAJAXFailure: function(transport) {
    this.triggerCallback('onFailure', transport);
    if (this._oldInnerHTML) {
      this.element.innerHTML = this._oldInnerHTML;
      this._oldInnerHTML = null;
    }
  },
  handleFormCancellation: function(e) {
    this.wrapUp();
    if (e) Event.stop(e);
  },
  handleFormSubmission: function(e) {
    var form = this._form;
    var value = $F(this._controls.editor);
    this.prepareSubmission();
    var params = this.options.callback(form, value) || '';
    if (Object.isString(params))
      params = params.toQueryParams();
    params.editorId = this.element.id;
    if (this.options.htmlResponse) {
      var options = Object.extend({ evalScripts: true }, this.options.ajaxOptions);
      Object.extend(options, {
        parameters: params,
        onComplete: this._boundWrapperHandler,
        onFailure: this._boundFailureHandler
      });
      new Ajax.Updater({ success: this.element }, this.url, options);
    } else {
      var options = Object.extend({ method: 'get' }, this.options.ajaxOptions);
      Object.extend(options, {
        parameters: params,
        onComplete: this._boundWrapperHandler,
        onFailure: this._boundFailureHandler
      });
      new Ajax.Request(this.url, options);
    }
    if (e) Event.stop(e);
  },
  leaveEditMode: function() {
    this.element.removeClassName(this.options.savingClassName);
    this.removeForm();
    this.leaveHover();
    this.element.style.backgroundColor = this._originalBackground;
    this.element.show();
    if (this.options.externalControl)
      this.options.externalControl.show();
    this._saving = false;
    this._editing = false;
    this._oldInnerHTML = null;
    this.triggerCallback('onLeaveEditMode');
  },
  leaveHover: function(e) {
    if (this.options.hoverClassName)
      this.element.removeClassName(this.options.hoverClassName);
    if (this._saving) return;
    this.triggerCallback('onLeaveHover');
  },
  loadExternalText: function() {
    this._form.addClassName(this.options.loadingClassName);
    this._controls.editor.disabled = true;
    var options = Object.extend({ method: 'get' }, this.options.ajaxOptions);
    Object.extend(options, {
      parameters: 'editorId=' + encodeURIComponent(this.element.id),
      onComplete: Prototype.emptyFunction,
      onSuccess: function(transport) {
        this._form.removeClassName(this.options.loadingClassName);
        var text = transport.responseText;
        if (this.options.stripLoadedTextTags)
          text = text.stripTags();
        this._controls.editor.value = text;
        this._controls.editor.disabled = false;
        this.postProcessEditField();
      }.bind(this),
      onFailure: this._boundFailureHandler
    });
    new Ajax.Request(this.options.loadTextURL, options);
  },
  postProcessEditField: function() {
    var fpc = this.options.fieldPostCreation;
    if (fpc)
      $(this._controls.editor)['focus' == fpc ? 'focus' : 'activate']();
  },
  prepareOptions: function() {
    this.options = Object.clone(Ajax.InPlaceEditor.DefaultOptions);
    Object.extend(this.options, Ajax.InPlaceEditor.DefaultCallbacks);
    [this._extraDefaultOptions].flatten().compact().each(function(defs) {
      Object.extend(this.options, defs);
    }.bind(this));
  },
  prepareSubmission: function() {
    this._saving = true;
    this.removeForm();
    this.leaveHover();
    this.showSaving();
  },
  registerListeners: function() {
    this._listeners = { };
    var listener;
    $H(Ajax.InPlaceEditor.Listeners).each(function(pair) {
      listener = this[pair.value].bind(this);
      this._listeners[pair.key] = listener;
      if (!this.options.externalControlOnly)
        this.element.observe(pair.key, listener);
      if (this.options.externalControl)
        this.options.externalControl.observe(pair.key, listener);
    }.bind(this));
  },
  removeForm: function() {
    if (!this._form) return;
    this._form.remove();
    this._form = null;
    this._controls = { };
  },
  showSaving: function() {
    this._oldInnerHTML = this.element.innerHTML;
    this.element.innerHTML = this.options.savingText;
    this.element.addClassName(this.options.savingClassName);
    this.element.style.backgroundColor = this._originalBackground;
    this.element.show();
  },
  triggerCallback: function(cbName, arg) {
    if ('function' == typeof this.options[cbName]) {
      this.options[cbName](this, arg);
    }
  },
  unregisterListeners: function() {
    $H(this._listeners).each(function(pair) {
      if (!this.options.externalControlOnly)
        this.element.stopObserving(pair.key, pair.value);
      if (this.options.externalControl)
        this.options.externalControl.stopObserving(pair.key, pair.value);
    }.bind(this));
  },
  wrapUp: function(transport) {
    this.leaveEditMode();
    // Can't use triggerCallback due to backward compatibility: requires
    // binding + direct element
    this._boundComplete(transport, this.element);
  }
});

Object.extend(Ajax.InPlaceEditor.prototype, {
  dispose: Ajax.InPlaceEditor.prototype.destroy
});

Ajax.InPlaceCollectionEditor = Class.create(Ajax.InPlaceEditor, {
  initialize: function($super, element, url, options) {
    this._extraDefaultOptions = Ajax.InPlaceCollectionEditor.DefaultOptions;
    $super(element, url, options);
  },

  createEditField: function() {
    var list = document.createElement('select');
    list.name = this.options.paramName;
    list.size = 1;
    this._controls.editor = list;
    this._collection = this.options.collection || [];
    if (this.options.loadCollectionURL)
      this.loadCollection();
    else
      this.checkForExternalText();
    this._form.appendChild(this._controls.editor);
  },

  loadCollection: function() {
    this._form.addClassName(this.options.loadingClassName);
    this.showLoadingText(this.options.loadingCollectionText);
    var options = Object.extend({ method: 'get' }, this.options.ajaxOptions);
    Object.extend(options, {
      parameters: 'editorId=' + encodeURIComponent(this.element.id),
      onComplete: Prototype.emptyFunction,
      onSuccess: function(transport) {
        var js = transport.responseText.strip();
        if (!/^\[.*\]$/.test(js)) // TODO: improve sanity check
          throw 'Server returned an invalid collection representation.';
        this._collection = eval(js);
        this.checkForExternalText();
      }.bind(this),
      onFailure: this.onFailure
    });
    new Ajax.Request(this.options.loadCollectionURL, options);
  },

  showLoadingText: function(text) {
    this._controls.editor.disabled = true;
    var tempOption = this._controls.editor.firstChild;
    if (!tempOption) {
      tempOption = document.createElement('option');
      tempOption.value = '';
      this._controls.editor.appendChild(tempOption);
      tempOption.selected = true;
    }
    tempOption.update((text || '').stripScripts().stripTags());
  },

  checkForExternalText: function() {
    this._text = this.getText();
    if (this.options.loadTextURL)
      this.loadExternalText();
    else
      this.buildOptionList();
  },

  loadExternalText: function() {
    this.showLoadingText(this.options.loadingText);
    var options = Object.extend({ method: 'get' }, this.options.ajaxOptions);
    Object.extend(options, {
      parameters: 'editorId=' + encodeURIComponent(this.element.id),
      onComplete: Prototype.emptyFunction,
      onSuccess: function(transport) {
        this._text = transport.responseText.strip();
        this.buildOptionList();
      }.bind(this),
      onFailure: this.onFailure
    });
    new Ajax.Request(this.options.loadTextURL, options);
  },

  buildOptionList: function() {
    this._form.removeClassName(this.options.loadingClassName);
    this._collection = this._collection.map(function(entry) {
      return 2 === entry.length ? entry : [entry, entry].flatten();
    });
    var marker = ('value' in this.options) ? this.options.value : this._text;
    var textFound = this._collection.any(function(entry) {
      return entry[0] == marker;
    }.bind(this));
    this._controls.editor.update('');
    var option;
    this._collection.each(function(entry, index) {
      option = document.createElement('option');
      option.value = entry[0];
      option.selected = textFound ? entry[0] == marker : 0 == index;
      option.appendChild(document.createTextNode(entry[1]));
      this._controls.editor.appendChild(option);
    }.bind(this));
    this._controls.editor.disabled = false;
    Field.scrollFreeActivate(this._controls.editor);
  }
});

//**** DEPRECATION LAYER FOR InPlace[Collection]Editor! ****
//**** This only  exists for a while,  in order to  let ****
//**** users adapt to  the new API.  Read up on the new ****
//**** API and convert your code to it ASAP!            ****

Ajax.InPlaceEditor.prototype.initialize.dealWithDeprecatedOptions = function(options) {
  if (!options) return;
  function fallback(name, expr) {
    if (name in options || expr === undefined) return;
    options[name] = expr;
  };
  fallback('cancelControl', (options.cancelLink ? 'link' : (options.cancelButton ? 'button' :
    options.cancelLink == options.cancelButton == false ? false : undefined)));
  fallback('okControl', (options.okLink ? 'link' : (options.okButton ? 'button' :
    options.okLink == options.okButton == false ? false : undefined)));
  fallback('highlightColor', options.highlightcolor);
  fallback('highlightEndColor', options.highlightendcolor);
};

Object.extend(Ajax.InPlaceEditor, {
  DefaultOptions: {
    ajaxOptions: { },
    autoRows: 3,                                // Use when multi-line w/ rows == 1
    cancelControl: 'link',                      // 'link'|'button'|false
    cancelText: 'cancel',
    clickToEditText: 'Click to edit',
    externalControl: null,                      // id|elt
    externalControlOnly: false,
    fieldPostCreation: 'activate',              // 'activate'|'focus'|false
    formClassName: 'inplaceeditor-form',
    formId: null,                               // id|elt
    highlightColor: '#ffff99',
    highlightEndColor: '#ffffff',
    hoverClassName: '',
    htmlResponse: true,
    loadingClassName: 'inplaceeditor-loading',
    loadingText: 'Loading...',
    okControl: 'button',                        // 'link'|'button'|false
    okText: 'ok',
    paramName: 'value',
    rows: 1,                                    // If 1 and multi-line, uses autoRows
    savingClassName: 'inplaceeditor-saving',
    savingText: 'Saving...',
    size: 0,
    stripLoadedTextTags: false,
    submitOnBlur: false,
    textAfterControls: '',
    textBeforeControls: '',
    textBetweenControls: ''
  },
  DefaultCallbacks: {
    callback: function(form) {
      return Form.serialize(form);
    },
    onComplete: function(transport, element) {
      // For backward compatibility, this one is bound to the IPE, and passes
      // the element directly.  It was too often customized, so we don't break it.
      new Effect.Highlight(element, {
        startcolor: this.options.highlightColor, keepBackgroundImage: true });
    },
    onEnterEditMode: null,
    onEnterHover: function(ipe) {
      ipe.element.style.backgroundColor = ipe.options.highlightColor;
      if (ipe._effect)
        ipe._effect.cancel();
    },
    onFailure: function(transport, ipe) {
      alert('Error communication with the server: ' + transport.responseText.stripTags());
    },
    onFormCustomization: null, // Takes the IPE and its generated form, after editor, before controls.
    onLeaveEditMode: null,
    onLeaveHover: function(ipe) {
      ipe._effect = new Effect.Highlight(ipe.element, {
        startcolor: ipe.options.highlightColor, endcolor: ipe.options.highlightEndColor,
        restorecolor: ipe._originalBackground, keepBackgroundImage: true
      });
    }
  },
  Listeners: {
    click: 'enterEditMode',
    keydown: 'checkForEscapeOrReturn',
    mouseover: 'enterHover',
    mouseout: 'leaveHover'
  }
});

Ajax.InPlaceCollectionEditor.DefaultOptions = {
  loadingCollectionText: 'Loading options...'
};

// Delayed observer, like Form.Element.Observer, 
// but waits for delay after last key input
// Ideal for live-search fields

Form.Element.DelayedObserver = Class.create({
  initialize: function(element, delay, callback) {
    this.delay     = delay || 0.5;
    this.element   = $(element);
    this.callback  = callback;
    this.timer     = null;
    this.lastValue = $F(this.element); 
    Event.observe(this.element,'keyup',this.delayedListener.bindAsEventListener(this));
  },
  delayedListener: function(event) {
    if(this.lastValue == $F(this.element)) return;
    if(this.timer) clearTimeout(this.timer);
    this.timer = setTimeout(this.onTimerEvent.bind(this), this.delay * 1000);
    this.lastValue = $F(this.element);
  },
  onTimerEvent: function() {
    this.timer = null;
    this.callback(this.element, $F(this.element));
  }
});

if (!Control) var Control = { };

// options:
//  axis: 'vertical', or 'horizontal' (default)
//
// callbacks:
//  onChange(value)
//  onSlide(value)
Control.Slider = Class.create({
  initialize: function(handle, track, options) {
    var slider = this;
    
    if (Object.isArray(handle)) {
      this.handles = handle.collect( function(e) { return $(e) });
    } else {
      this.handles = [$(handle)];
    }
    
    this.track   = $(track);
    this.options = options || { };

    this.axis      = this.options.axis || 'horizontal';
    this.increment = this.options.increment || 1;
    this.step      = parseInt(this.options.step || '1');
    this.range     = this.options.range || $R(0,1);
    
    this.value     = 0; // assure backwards compat
    this.values    = this.handles.map( function() { return 0 });
    this.spans     = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false;
    this.options.startSpan = $(this.options.startSpan || null);
    this.options.endSpan   = $(this.options.endSpan || null);

    this.restricted = this.options.restricted || false;

    this.maximum   = this.options.maximum || this.range.end;
    this.minimum   = this.options.minimum || this.range.start;

    // Will be used to align the handle onto the track, if necessary
    this.alignX = parseInt(this.options.alignX || '0');
    this.alignY = parseInt(this.options.alignY || '0');
    
    this.trackLength = this.maximumOffset() - this.minimumOffset();

    this.handleLength = this.isVertical() ? 
      (this.handles[0].offsetHeight != 0 ? 
        this.handles[0].offsetHeight : this.handles[0].style.height.replace(/px$/,"")) : 
      (this.handles[0].offsetWidth != 0 ? this.handles[0].offsetWidth : 
        this.handles[0].style.width.replace(/px$/,""));

    this.active   = false;
    this.dragging = false;
    this.disabled = false;

    if (this.options.disabled) this.setDisabled();

    // Allowed values array
    this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;
    if (this.allowedValues) {
      this.minimum = this.allowedValues.min();
      this.maximum = this.allowedValues.max();
    }

    this.eventMouseDown = this.startDrag.bindAsEventListener(this);
    this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
    this.eventMouseMove = this.update.bindAsEventListener(this);

    // Initialize handles in reverse (make sure first handle is active)
    this.handles.each( function(h,i) {
      i = slider.handles.length-1-i;
      slider.setValue(parseFloat(
        (Object.isArray(slider.options.sliderValue) ? 
          slider.options.sliderValue[i] : slider.options.sliderValue) || 
         slider.range.start), i);
      h.makePositioned().observe("mousedown", slider.eventMouseDown);
    });
    
    this.track.observe("mousedown", this.eventMouseDown);
    document.observe("mouseup", this.eventMouseUp);
    document.observe("mousemove", this.eventMouseMove);
    
    this.initialized = true;
  },
  dispose: function() {
    var slider = this;    
    Event.stopObserving(this.track, "mousedown", this.eventMouseDown);
    Event.stopObserving(document, "mouseup", this.eventMouseUp);
    Event.stopObserving(document, "mousemove", this.eventMouseMove);
    this.handles.each( function(h) {
      Event.stopObserving(h, "mousedown", slider.eventMouseDown);
    });
  },
  setDisabled: function(){
    this.disabled = true;
  },
  setEnabled: function(){
    this.disabled = false;
  },  
  getNearestValue: function(value){
    if (this.allowedValues){
      if (value >= this.allowedValues.max()) return(this.allowedValues.max());
      if (value <= this.allowedValues.min()) return(this.allowedValues.min());
      
      var offset = Math.abs(this.allowedValues[0] - value);
      var newValue = this.allowedValues[0];
      this.allowedValues.each( function(v) {
        var currentOffset = Math.abs(v - value);
        if (currentOffset <= offset){
          newValue = v;
          offset = currentOffset;
        } 
      });
      return newValue;
    }
    if (value > this.range.end) return this.range.end;
    if (value < this.range.start) return this.range.start;
    return value;
  },
  setValue: function(sliderValue, handleIdx){
    if (!this.active) {
      this.activeHandleIdx = handleIdx || 0;
      this.activeHandle    = this.handles[this.activeHandleIdx];
      this.updateStyles();
    }
    handleIdx = handleIdx || this.activeHandleIdx || 0;
    if (this.initialized && this.restricted) {
      if ((handleIdx>0) && (sliderValue<this.values[handleIdx-1]))
        sliderValue = this.values[handleIdx-1];
      if ((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1]))
        sliderValue = this.values[handleIdx+1];
    }
    sliderValue = this.getNearestValue(sliderValue);
    this.values[handleIdx] = sliderValue;
    this.value = this.values[0]; // assure backwards compat
    
    this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] = 
      this.translateToPx(sliderValue);
    
    this.drawSpans();
    if (!this.dragging || !this.event) this.updateFinished();
  },
  setValueBy: function(delta, handleIdx) {
    this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta, 
      handleIdx || this.activeHandleIdx || 0);
  },
  translateToPx: function(value) {
    return Math.round(
      ((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) * 
      (value - this.range.start)) + "px";
  },
  translateToValue: function(offset) {
    return ((offset/(this.trackLength-this.handleLength) * 
      (this.range.end-this.range.start)) + this.range.start);
  },
  getRange: function(range) {
    var v = this.values.sortBy(Prototype.K); 
    range = range || 0;
    return $R(v[range],v[range+1]);
  },
  minimumOffset: function(){
    return(this.isVertical() ? this.alignY : this.alignX);
  },
  maximumOffset: function(){
    return(this.isVertical() ? 
      (this.track.offsetHeight != 0 ? this.track.offsetHeight :
        this.track.style.height.replace(/px$/,"")) - this.alignY : 
      (this.track.offsetWidth != 0 ? this.track.offsetWidth : 
        this.track.style.width.replace(/px$/,"")) - this.alignX);
  },  
  isVertical:  function(){
    return (this.axis == 'vertical');
  },
  drawSpans: function() {
    var slider = this;
    if (this.spans)
      $R(0, this.spans.length-1).each(function(r) { slider.setSpan(slider.spans[r], slider.getRange(r)) });
    if (this.options.startSpan)
      this.setSpan(this.options.startSpan,
        $R(0, this.values.length>1 ? this.getRange(0).min() : this.value ));
    if (this.options.endSpan)
      this.setSpan(this.options.endSpan, 
        $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum));
  },
  setSpan: function(span, range) {
    if (this.isVertical()) {
      span.style.top = this.translateToPx(range.start);
      span.style.height = this.translateToPx(range.end - range.start + this.range.start);
    } else {
      span.style.left = this.translateToPx(range.start);
      span.style.width = this.translateToPx(range.end - range.start + this.range.start);
    }
  },
  updateStyles: function() {
    this.handles.each( function(h){ Element.removeClassName(h, 'selected') });
    Element.addClassName(this.activeHandle, 'selected');
  },
  startDrag: function(event) {
    if (Event.isLeftClick(event)) {
      if (!this.disabled){
        this.active = true;
        
        var handle = Event.element(event);
        var pointer  = [Event.pointerX(event), Event.pointerY(event)];
        var track = handle;
        if (track==this.track) {
          var offsets  = Position.cumulativeOffset(this.track); 
          this.event = event;
          this.setValue(this.translateToValue( 
           (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]-offsets[0])-(this.handleLength/2)
          ));
          var offsets  = Position.cumulativeOffset(this.activeHandle);
          this.offsetX = (pointer[0] - offsets[0]);
          this.offsetY = (pointer[1] - offsets[1]);
        } else {
          // find the handle (prevents issues with Safari)
          while((this.handles.indexOf(handle) == -1) && handle.parentNode) 
            handle = handle.parentNode;
            
          if (this.handles.indexOf(handle)!=-1) {
            this.activeHandle    = handle;
            this.activeHandleIdx = this.handles.indexOf(this.activeHandle);
            this.updateStyles();
            
            var offsets  = Position.cumulativeOffset(this.activeHandle);
            this.offsetX = (pointer[0] - offsets[0]);
            this.offsetY = (pointer[1] - offsets[1]);
          }
        }
      }
      Event.stop(event);
    }
  },
  update: function(event) {
   if (this.active) {
      if (!this.dragging) this.dragging = true;
      this.draw(event);
      if (Prototype.Browser.WebKit) window.scrollBy(0,0);
      Event.stop(event);
   }
  },
  draw: function(event) {
    var pointer = [Event.pointerX(event), Event.pointerY(event)];
    var offsets = Position.cumulativeOffset(this.track);
    pointer[0] -= this.offsetX + offsets[0];
    pointer[1] -= this.offsetY + offsets[1];
    this.event = event;
    this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] ));
    if (this.initialized && this.options.onSlide)
      this.options.onSlide(this.values.length>1 ? this.values : this.value, this);
  },
  endDrag: function(event) {
    if (this.active && this.dragging) {
      this.finishDrag(event, true);
      Event.stop(event);
    }
    this.active = false;
    this.dragging = false;
  },  
  finishDrag: function(event, success) {
    this.active = false;
    this.dragging = false;
    this.updateFinished();
  },
  updateFinished: function() {
    if (this.initialized && this.options.onChange) 
      this.options.onChange(this.values.length>1 ? this.values : this.value, this);
    this.event = null;
  }
});

if(Object.isUndefined(Effect))
  throw("dragdrop.js requires including script.aculo.us' effects.js library");

var Droppables = {
  drops: [],

  remove: function(element) {
    this.drops = this.drops.reject(function(d) { return d.element==$(element) });
  },

  add: function(element) {
    element = $(element);
    var options = Object.extend({
      greedy:     true,
      hoverclass: null,
      tree:       false
    }, arguments[1] || { });

    // cache containers
    if(options.containment) {
      options._containers = [];
      var containment = options.containment;
      if(Object.isArray(containment)) {
        containment.each( function(c) { options._containers.push($(c)) });
      } else {
        options._containers.push($(containment));
      }
    }
    
    if(options.accept) options.accept = [options.accept].flatten();

    Element.makePositioned(element); // fix IE
    options.element = element;

    this.drops.push(options);
  },
  
  findDeepestChild: function(drops) {
    deepest = drops[0];
      
    for (i = 1; i < drops.length; ++i)
      if (Element.isParent(drops[i].element, deepest.element))
        deepest = drops[i];
    
    return deepest;
  },

  isContained: function(element, drop) {
    var containmentNode;
    if(drop.tree) {
      containmentNode = element.treeNode; 
    } else {
      containmentNode = element.parentNode;
    }
    return drop._containers.detect(function(c) { return containmentNode == c });
  },
  
  isAffected: function(point, element, drop) {
    return (
      (drop.element!=element) &&
      ((!drop._containers) ||
        this.isContained(element, drop)) &&
      ((!drop.accept) ||
        (Element.classNames(element).detect( 
          function(v) { return drop.accept.include(v) } ) )) &&
      Position.within(drop.element, point[0], point[1]) );
  },

  deactivate: function(drop) {
    if(drop.hoverclass)
      Element.removeClassName(drop.element, drop.hoverclass);
    this.last_active = null;
  },

  activate: function(drop) {
    if(drop.hoverclass)
      Element.addClassName(drop.element, drop.hoverclass);
    this.last_active = drop;
  },

  show: function(point, element) {
    if(!this.drops.length) return;
    var drop, affected = [];
    
    this.drops.each( function(drop) {
      if(Droppables.isAffected(point, element, drop))
        affected.push(drop);
    });
        
    if(affected.length>0)
      drop = Droppables.findDeepestChild(affected);

    if(this.last_active && this.last_active != drop) this.deactivate(this.last_active);
    if (drop) {
      Position.within(drop.element, point[0], point[1]);
      if(drop.onHover)
        drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element));
      
      if (drop != this.last_active) Droppables.activate(drop);
    }
  },

  fire: function(event, element) {
    if(!this.last_active) return;
    Position.prepare();

    if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active))
      if (this.last_active.onDrop) {
        this.last_active.onDrop(element, this.last_active.element, event); 
        return true; 
      }
  },

  reset: function() {
    if(this.last_active)
      this.deactivate(this.last_active);
  }
}

var Draggables = {
  drags: [],
  observers: [],
  
  register: function(draggable) {
    if(this.drags.length == 0) {
      this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
      this.eventMouseMove = this.updateDrag.bindAsEventListener(this);
      this.eventKeypress  = this.keyPress.bindAsEventListener(this);
      
      Event.observe(document, "mouseup", this.eventMouseUp);
      Event.observe(document, "mousemove", this.eventMouseMove);
      Event.observe(document, "keypress", this.eventKeypress);
    }
    this.drags.push(draggable);
  },
  
  unregister: function(draggable) {
    this.drags = this.drags.reject(function(d) { return d==draggable });
    if(this.drags.length == 0) {
      Event.stopObserving(document, "mouseup", this.eventMouseUp);
      Event.stopObserving(document, "mousemove", this.eventMouseMove);
      Event.stopObserving(document, "keypress", this.eventKeypress);
    }
  },
  
  activate: function(draggable) {
    if(draggable.options.delay) { 
      this._timeout = setTimeout(function() { 
        Draggables._timeout = null; 
        window.focus(); 
        Draggables.activeDraggable = draggable; 
      }.bind(this), draggable.options.delay); 
    } else {
      window.focus(); // allows keypress events if window isn't currently focused, fails for Safari
      this.activeDraggable = draggable;
    }
  },
  
  deactivate: function() {
    this.activeDraggable = null;
  },
  
  updateDrag: function(event) {
    if(!this.activeDraggable) return;
    var pointer = [Event.pointerX(event), Event.pointerY(event)];
    // Mozilla-based browsers fire successive mousemove events with
    // the same coordinates, prevent needless redrawing (moz bug?)
    if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return;
    this._lastPointer = pointer;
    
    this.activeDraggable.updateDrag(event, pointer);
  },
  
  endDrag: function(event) {
    if(this._timeout) { 
      clearTimeout(this._timeout); 
      this._timeout = null; 
    }
    if(!this.activeDraggable) return;
    this._lastPointer = null;
    this.activeDraggable.endDrag(event);
    this.activeDraggable = null;
  },
  
  keyPress: function(event) {
    if(this.activeDraggable)
      this.activeDraggable.keyPress(event);
  },
  
  addObserver: function(observer) {
    this.observers.push(observer);
    this._cacheObserverCallbacks();
  },
  
  removeObserver: function(element) {  // element instead of observer fixes mem leaks
    this.observers = this.observers.reject( function(o) { return o.element==element });
    this._cacheObserverCallbacks();
  },
  
  notify: function(eventName, draggable, event) {  // 'onStart', 'onEnd', 'onDrag'
    if(this[eventName+'Count'] > 0)
      this.observers.each( function(o) {
        if(o[eventName]) o[eventName](eventName, draggable, event);
      });
    if(draggable.options[eventName]) draggable.options[eventName](draggable, event);
  },
  
  _cacheObserverCallbacks: function() {
    ['onStart','onEnd','onDrag'].each( function(eventName) {
      Draggables[eventName+'Count'] = Draggables.observers.select(
        function(o) { return o[eventName]; }
      ).length;
    });
  }
}

/*--------------------------------------------------------------------------*/

var Draggable = Class.create({
  initialize: function(element) {
    var defaults = {
      handle: false,
      reverteffect: function(element, top_offset, left_offset) {
        var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;
        new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur,
          queue: {scope:'_draggable', position:'end'}
        });
      },
      endeffect: function(element) {
        var toOpacity = Object.isNumber(element._opacity) ? element._opacity : 1.0;
        new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity, 
          queue: {scope:'_draggable', position:'end'},
          afterFinish: function(){ 
            Draggable._dragging[element] = false 
          }
        }); 
      },
      zindex: 1000,
      revert: false,
      quiet: false,
      scroll: false,
      scrollSensitivity: 20,
      scrollSpeed: 15,
      snap: false,  // false, or xy or [x,y] or function(x,y){ return [x,y] }
      delay: 0
    };
    
    if(!arguments[1] || Object.isUndefined(arguments[1].endeffect))
      Object.extend(defaults, {
        starteffect: function(element) {
          element._opacity = Element.getOpacity(element);
          Draggable._dragging[element] = true;
          new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7}); 
        }
      });
    
    var options = Object.extend(defaults, arguments[1] || { });

    this.element = $(element);
    
    if(options.handle && Object.isString(options.handle))
      this.handle = this.element.down('.'+options.handle, 0);
    
    if(!this.handle) this.handle = $(options.handle);
    if(!this.handle) this.handle = this.element;
    
    if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML) {
      options.scroll = $(options.scroll);
      this._isScrollChild = Element.childOf(this.element, options.scroll);
    }

    Element.makePositioned(this.element); // fix IE    

    this.options  = options;
    this.dragging = false;   

    this.eventMouseDown = this.initDrag.bindAsEventListener(this);
    Event.observe(this.handle, "mousedown", this.eventMouseDown);
    
    Draggables.register(this);
  },
  
  destroy: function() {
    Event.stopObserving(this.handle, "mousedown", this.eventMouseDown);
    Draggables.unregister(this);
  },
  
  currentDelta: function() {
    return([
      parseInt(Element.getStyle(this.element,'left') || '0'),
      parseInt(Element.getStyle(this.element,'top') || '0')]);
  },
  
  initDrag: function(event) {
    if(!Object.isUndefined(Draggable._dragging[this.element]) &&
      Draggable._dragging[this.element]) return;
    if(Event.isLeftClick(event)) {    
      // abort on form elements, fixes a Firefox issue
      var src = Event.element(event);
      if((tag_name = src.tagName.toUpperCase()) && (
        tag_name=='INPUT' ||
        tag_name=='SELECT' ||
        tag_name=='OPTION' ||
        tag_name=='BUTTON' ||
        tag_name=='TEXTAREA')) return;
        
      var pointer = [Event.pointerX(event), Event.pointerY(event)];
      var pos     = Position.cumulativeOffset(this.element);
      this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) });
      
      Draggables.activate(this);
      Event.stop(event);
    }
  },
  
  startDrag: function(event) {
    this.dragging = true;
    if(!this.delta)
      this.delta = this.currentDelta();
    
    if(this.options.zindex) {
      this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0);
      this.element.style.zIndex = this.options.zindex;
    }
    
    if(this.options.ghosting) {
      this._clone = this.element.cloneNode(true);
      this.element._originallyAbsolute = (this.element.getStyle('position') == 'absolute');
      if (!this.element._originallyAbsolute)
        Position.absolutize(this.element);
      this.element.parentNode.insertBefore(this._clone, this.element);
    }
    
    if(this.options.scroll) {
      if (this.options.scroll == window) {
        var where = this._getWindowScroll(this.options.scroll);
        this.originalScrollLeft = where.left;
        this.originalScrollTop = where.top;
      } else {
        this.originalScrollLeft = this.options.scroll.scrollLeft;
        this.originalScrollTop = this.options.scroll.scrollTop;
      }
    }
    
    Draggables.notify('onStart', this, event);
        
    if(this.options.starteffect) this.options.starteffect(this.element);
  },
  
  updateDrag: function(event, pointer) {
    if(!this.dragging) this.startDrag(event);
    
    if(!this.options.quiet){
      Position.prepare();
      Droppables.show(pointer, this.element);
    }
    
    Draggables.notify('onDrag', this, event);
    
    this.draw(pointer);
    if(this.options.change) this.options.change(this);
    
    if(this.options.scroll) {
      this.stopScrolling();
      
      var p;
      if (this.options.scroll == window) {
        with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; }
      } else {
        p = Position.page(this.options.scroll);
        p[0] += this.options.scroll.scrollLeft + Position.deltaX;
        p[1] += this.options.scroll.scrollTop + Position.deltaY;
        p.push(p[0]+this.options.scroll.offsetWidth);
        p.push(p[1]+this.options.scroll.offsetHeight);
      }
      var speed = [0,0];
      if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity);
      if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity);
      if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity);
      if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity);
      this.startScrolling(speed);
    }
    
    // fix AppleWebKit rendering
    if(Prototype.Browser.WebKit) window.scrollBy(0,0);
    
    Event.stop(event);
  },
  
  finishDrag: function(event, success) {
    this.dragging = false;
    
    if(this.options.quiet){
      Position.prepare();
      var pointer = [Event.pointerX(event), Event.pointerY(event)];
      Droppables.show(pointer, this.element);
    }

    if(this.options.ghosting) {
      if (!this.element._originallyAbsolute)
        Position.relativize(this.element);
      delete this.element._originallyAbsolute;
      Element.remove(this._clone);
      this._clone = null;
    }

    var dropped = false; 
    if(success) { 
      dropped = Droppables.fire(event, this.element); 
      if (!dropped) dropped = false; 
    }
    if(dropped && this.options.onDropped) this.options.onDropped(this.element);
    Draggables.notify('onEnd', this, event);

    var revert = this.options.revert;
    if(revert && Object.isFunction(revert)) revert = revert(this.element);
    
    var d = this.currentDelta();
    if(revert && this.options.reverteffect) {
      if (dropped == 0 || revert != 'failure')
        this.options.reverteffect(this.element,
          d[1]-this.delta[1], d[0]-this.delta[0]);
    } else {
      this.delta = d;
    }

    if(this.options.zindex)
      this.element.style.zIndex = this.originalZ;

    if(this.options.endeffect) 
      this.options.endeffect(this.element);
      
    Draggables.deactivate(this);
    Droppables.reset();
  },
  
  keyPress: function(event) {
    if(event.keyCode!=Event.KEY_ESC) return;
    this.finishDrag(event, false);
    Event.stop(event);
  },
  
  endDrag: function(event) {
    if(!this.dragging) return;
    this.stopScrolling();
    this.finishDrag(event, true);
    Event.stop(event);
  },
  
  draw: function(point) {
    var pos = Position.cumulativeOffset(this.element);
    if(this.options.ghosting) {
      var r   = Position.realOffset(this.element);
      pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY;
    }
    
    var d = this.currentDelta();
    pos[0] -= d[0]; pos[1] -= d[1];
    
    if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) {
      pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft;
      pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop;
    }
    
    var p = [0,1].map(function(i){ 
      return (point[i]-pos[i]-this.offset[i]) 
    }.bind(this));
    
    if(this.options.snap) {
      if(Object.isFunction(this.options.snap)) {
        p = this.options.snap(p[0],p[1],this);
      } else {
      if(Object.isArray(this.options.snap)) {
        p = p.map( function(v, i) {
          return (v/this.options.snap[i]).round()*this.options.snap[i] }.bind(this))
      } else {
        p = p.map( function(v) {
          return (v/this.options.snap).round()*this.options.snap }.bind(this))
      }
    }}
    
    var style = this.element.style;
    if((!this.options.constraint) || (this.options.constraint=='horizontal'))
      style.left = p[0] + "px";
    if((!this.options.constraint) || (this.options.constraint=='vertical'))
      style.top  = p[1] + "px";
    
    if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering
  },
  
  stopScrolling: function() {
    if(this.scrollInterval) {
      clearInterval(this.scrollInterval);
      this.scrollInterval = null;
      Draggables._lastScrollPointer = null;
    }
  },
  
  startScrolling: function(speed) {
    if(!(speed[0] || speed[1])) return;
    this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed];
    this.lastScrolled = new Date();
    this.scrollInterval = setInterval(this.scroll.bind(this), 10);
  },
  
  scroll: function() {
    var current = new Date();
    var delta = current - this.lastScrolled;
    this.lastScrolled = current;
    if(this.options.scroll == window) {
      with (this._getWindowScroll(this.options.scroll)) {
        if (this.scrollSpeed[0] || this.scrollSpeed[1]) {
          var d = delta / 1000;
          this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] );
        }
      }
    } else {
      this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000;
      this.options.scroll.scrollTop  += this.scrollSpeed[1] * delta / 1000;
    }
    
    Position.prepare();
    Droppables.show(Draggables._lastPointer, this.element);
    Draggables.notify('onDrag', this);
    if (this._isScrollChild) {
      Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer);
      Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000;
      Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000;
      if (Draggables._lastScrollPointer[0] < 0)
        Draggables._lastScrollPointer[0] = 0;
      if (Draggables._lastScrollPointer[1] < 0)
        Draggables._lastScrollPointer[1] = 0;
      this.draw(Draggables._lastScrollPointer);
    }
    
    if(this.options.change) this.options.change(this);
  },
  
  _getWindowScroll: function(w) {
    var T, L, W, H;
    with (w.document) {
      if (w.document.documentElement && documentElement.scrollTop) {
        T = documentElement.scrollTop;
        L = documentElement.scrollLeft;
      } else if (w.document.body) {
        T = body.scrollTop;
        L = body.scrollLeft;
      }
      if (w.innerWidth) {
        W = w.innerWidth;
        H = w.innerHeight;
      } else if (w.document.documentElement && documentElement.clientWidth) {
        W = documentElement.clientWidth;
        H = documentElement.clientHeight;
      } else {
        W = body.offsetWidth;
        H = body.offsetHeight
      }
    }
    return { top: T, left: L, width: W, height: H };
  }
});

Draggable._dragging = { };

/*--------------------------------------------------------------------------*/

var SortableObserver = Class.create({
  initialize: function(element, observer) {
    this.element   = $(element);
    this.observer  = observer;
    this.lastValue = Sortable.serialize(this.element);
  },
  
  onStart: function() {
    this.lastValue = Sortable.serialize(this.element);
  },
  
  onEnd: function() {
    Sortable.unmark();
    if(this.lastValue != Sortable.serialize(this.element))
      this.observer(this.element)
  }
});

var Sortable = {
  SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/,
  
  sortables: { },
  
  _findRootElement: function(element) {
    while (element.tagName.toUpperCase() != "BODY") {  
      if(element.id && Sortable.sortables[element.id]) return element;
      element = element.parentNode;
    }
  },

  options: function(element) {
    element = Sortable._findRootElement($(element));
    if(!element) return;
    return Sortable.sortables[element.id];
  },
  
  destroy: function(element){
    var s = Sortable.options(element);
    
    if(s) {
      Draggables.removeObserver(s.element);
      s.droppables.each(function(d){ Droppables.remove(d) });
      s.draggables.invoke('destroy');
      
      delete Sortable.sortables[s.element.id];
    }
  },

  create: function(element) {
    element = $(element);
    var options = Object.extend({ 
      element:     element,
      tag:         'li',       // assumes li children, override with tag: 'tagname'
      dropOnEmpty: false,
      tree:        false,
      treeTag:     'ul',
      overlap:     'vertical', // one of 'vertical', 'horizontal'
      constraint:  'vertical', // one of 'vertical', 'horizontal', false
      containment: element,    // also takes array of elements (or id's); or false
      handle:      false,      // or a CSS class
      only:        false,
      delay:       0,
      hoverclass:  null,
      ghosting:    false,
      quiet:       false, 
      scroll:      false,
      scrollSensitivity: 20,
      scrollSpeed: 15,
      format:      this.SERIALIZE_RULE,
      
      // these take arrays of elements or ids and can be 
      // used for better initialization performance
      elements:    false,
      handles:     false,
      
      onChange:    Prototype.emptyFunction,
      onUpdate:    Prototype.emptyFunction
    }, arguments[1] || { });

    // clear any old sortable with same element
    this.destroy(element);

    // build options for the draggables
    var options_for_draggable = {
      revert:      true,
      quiet:       options.quiet,
      scroll:      options.scroll,
      scrollSpeed: options.scrollSpeed,
      scrollSensitivity: options.scrollSensitivity,
      delay:       options.delay,
      ghosting:    options.ghosting,
      constraint:  options.constraint,
      handle:      options.handle };

    if(options.starteffect)
      options_for_draggable.starteffect = options.starteffect;

    if(options.reverteffect)
      options_for_draggable.reverteffect = options.reverteffect;
    else
      if(options.ghosting) options_for_draggable.reverteffect = function(element) {
        element.style.top  = 0;
        element.style.left = 0;
      };

    if(options.endeffect)
      options_for_draggable.endeffect = options.endeffect;

    if(options.zindex)
      options_for_draggable.zindex = options.zindex;

    // build options for the droppables  
    var options_for_droppable = {
      overlap:     options.overlap,
      containment: options.containment,
      tree:        options.tree,
      hoverclass:  options.hoverclass,
      onHover:     Sortable.onHover
    }
    
    var options_for_tree = {
      onHover:      Sortable.onEmptyHover,
      overlap:      options.overlap,
      containment:  options.containment,
      hoverclass:   options.hoverclass
    }

    // fix for gecko engine
    Element.cleanWhitespace(element); 

    options.draggables = [];
    options.droppables = [];

    // drop on empty handling
    if(options.dropOnEmpty || options.tree) {
      Droppables.add(element, options_for_tree);
      options.droppables.push(element);
    }

    (options.elements || this.findElements(element, options) || []).each( function(e,i) {
      var handle = options.handles ? $(options.handles[i]) :
        (options.handle ? $(e).select('.' + options.handle)[0] : e); 
      options.draggables.push(
        new Draggable(e, Object.extend(options_for_draggable, { handle: handle })));
      Droppables.add(e, options_for_droppable);
      if(options.tree) e.treeNode = element;
      options.droppables.push(e);      
    });
    
    if(options.tree) {
      (Sortable.findTreeElements(element, options) || []).each( function(e) {
        Droppables.add(e, options_for_tree);
        e.treeNode = element;
        options.droppables.push(e);
      });
    }

    // keep reference
    this.sortables[element.id] = options;

    // for onupdate
    Draggables.addObserver(new SortableObserver(element, options.onUpdate));

  },

  // return all suitable-for-sortable elements in a guaranteed order
  findElements: function(element, options) {
    return Element.findChildren(
      element, options.only, options.tree ? true : false, options.tag);
  },
  
  findTreeElements: function(element, options) {
    return Element.findChildren(
      element, options.only, options.tree ? true : false, options.treeTag);
  },

  onHover: function(element, dropon, overlap) {
    if(Element.isParent(dropon, element)) return;

    if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) {
      return;
    } else if(overlap>0.5) {
      Sortable.mark(dropon, 'before');
      if(dropon.previousSibling != element) {
        var oldParentNode = element.parentNode;
        element.style.visibility = "hidden"; // fix gecko rendering
        dropon.parentNode.insertBefore(element, dropon);
        if(dropon.parentNode!=oldParentNode) 
          Sortable.options(oldParentNode).onChange(element);
        Sortable.options(dropon.parentNode).onChange(element);
      }
    } else {
      Sortable.mark(dropon, 'after');
      var nextElement = dropon.nextSibling || null;
      if(nextElement != element) {
        var oldParentNode = element.parentNode;
        element.style.visibility = "hidden"; // fix gecko rendering
        dropon.parentNode.insertBefore(element, nextElement);
        if(dropon.parentNode!=oldParentNode) 
          Sortable.options(oldParentNode).onChange(element);
        Sortable.options(dropon.parentNode).onChange(element);
      }
    }
  },
  
  onEmptyHover: function(element, dropon, overlap) {
    var oldParentNode = element.parentNode;
    var droponOptions = Sortable.options(dropon);
        
    if(!Element.isParent(dropon, element)) {
      var index;
      
      var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only});
      var child = null;
            
      if(children) {
        var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap);
        
        for (index = 0; index < children.length; index += 1) {
          if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) {
            offset -= Element.offsetSize (children[index], droponOptions.overlap);
          } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) {
            child = index + 1 < children.length ? children[index + 1] : null;
            break;
          } else {
            child = children[index];
            break;
          }
        }
      }
      
      dropon.insertBefore(element, child);
      
      Sortable.options(oldParentNode).onChange(element);
      droponOptions.onChange(element);
    }
  },

  unmark: function() {
    if(Sortable._marker) Sortable._marker.hide();
  },

  mark: function(dropon, position) {
    // mark on ghosting only
    var sortable = Sortable.options(dropon.parentNode);
    if(sortable && !sortable.ghosting) return; 

    if(!Sortable._marker) {
      Sortable._marker = 
        ($('dropmarker') || Element.extend(document.createElement('DIV'))).
          hide().addClassName('dropmarker').setStyle({position:'absolute'});
      document.getElementsByTagName("body").item(0).appendChild(Sortable._marker);
    }    
    var offsets = Position.cumulativeOffset(dropon);
    Sortable._marker.setStyle({left: offsets[0]+'px', top: offsets[1] + 'px'});
    
    if(position=='after')
      if(sortable.overlap == 'horizontal') 
        Sortable._marker.setStyle({left: (offsets[0]+dropon.clientWidth) + 'px'});
      else
        Sortable._marker.setStyle({top: (offsets[1]+dropon.clientHeight) + 'px'});
    
    Sortable._marker.show();
  },
  
  _tree: function(element, options, parent) {
    var children = Sortable.findElements(element, options) || [];
  
    for (var i = 0; i < children.length; ++i) {
      var match = children[i].id.match(options.format);

      if (!match) continue;
      
      var child = {
        id: encodeURIComponent(match ? match[1] : null),
        element: element,
        parent: parent,
        children: [],
        position: parent.children.length,
        container: $(children[i]).down(options.treeTag)
      }
      
      /* Get the element containing the children and recurse over it */
      if (child.container)
        this._tree(child.container, options, child)
      
      parent.children.push (child);
    }

    return parent; 
  },

  tree: function(element) {
    element = $(element);
    var sortableOptions = this.options(element);
    var options = Object.extend({
      tag: sortableOptions.tag,
      treeTag: sortableOptions.treeTag,
      only: sortableOptions.only,
      name: element.id,
      format: sortableOptions.format
    }, arguments[1] || { });
    
    var root = {
      id: null,
      parent: null,
      children: [],
      container: element,
      position: 0
    }
    
    return Sortable._tree(element, options, root);
  },

  /* Construct a [i] index for a particular node */
  _constructIndex: function(node) {
    var index = '';
    do {
      if (node.id) index = '[' + node.position + ']' + index;
    } while ((node = node.parent) != null);
    return index;
  },

  sequence: function(element) {
    element = $(element);
    var options = Object.extend(this.options(element), arguments[1] || { });
    
    return $(this.findElements(element, options) || []).map( function(item) {
      return item.id.match(options.format) ? item.id.match(options.format)[1] : '';
    });
  },

  setSequence: function(element, new_sequence) {
    element = $(element);
    var options = Object.extend(this.options(element), arguments[2] || { });
    
    var nodeMap = { };
    this.findElements(element, options).each( function(n) {
        if (n.id.match(options.format))
            nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode];
        n.parentNode.removeChild(n);
    });
   
    new_sequence.each(function(ident) {
      var n = nodeMap[ident];
      if (n) {
        n[1].appendChild(n[0]);
        delete nodeMap[ident];
      }
    });
  },
  
  serialize: function(element) {
    element = $(element);
    var options = Object.extend(Sortable.options(element), arguments[1] || { });
    var name = encodeURIComponent(
      (arguments[1] && arguments[1].name) ? arguments[1].name : element.id);
    
    if (options.tree) {
      return Sortable.tree(element, arguments[1]).children.map( function (item) {
        return [name + Sortable._constructIndex(item) + "[id]=" + 
                encodeURIComponent(item.id)].concat(item.children.map(arguments.callee));
      }).flatten().join('&');
    } else {
      return Sortable.sequence(element, arguments[1]).map( function(item) {
        return name + "[]=" + encodeURIComponent(item);
      }).join('&');
    }
  }
}

// Returns true if child is contained within element
Element.isParent = function(child, element) {
  if (!child.parentNode || child == element) return false;
  if (child.parentNode == element) return true;
  return Element.isParent(child.parentNode, element);
}

Element.findChildren = function(element, only, recursive, tagName) {   
  if(!element.hasChildNodes()) return null;
  tagName = tagName.toUpperCase();
  if(only) only = [only].flatten();
  var elements = [];
  $A(element.childNodes).each( function(e) {
    if(e.tagName && e.tagName.toUpperCase()==tagName &&
      (!only || (Element.classNames(e).detect(function(v) { return only.include(v) }))))
        elements.push(e);
    if(recursive) {
      var grandchildren = Element.findChildren(e, only, recursive, tagName);
      if(grandchildren) elements.push(grandchildren);
    }
  });

  return (elements.length>0 ? elements.flatten() : []);
}

Element.offsetSize = function (element, type) {
  return element['offset' + ((type=='vertical' || type=='height') ? 'Height' : 'Width')];
}
/**
 * Same logic as before. Have removed some detection capabilities in an effort
 * to reduce reliance on browser detection in general.
 * 
 * If there is a particualr detection you feel you need please file a ticket
 * with the request or add the detection yourself with the exact reason you
 * need said detection. Hopefully we'll be able to keep the number of
 * detection utility functions to a minimum in favor of behavioral testing.
 * 
 * This may also be the place for very common behavioral functions.
 * 
 */

if (typeof(AC) === "undefined") { 
	AC = {}; 
}

AC.Detector = {

	getAgent: function() {
		return navigator.userAgent.toLowerCase();
	},
	
	// detect platform
	isMac: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return !!agent.match(/mac/i);
	},
	
	isWin: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return !!agent.match(/win/i);
	},
	
	isWin2k: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return this.isWin(agent) && (agent.match(/nt\s*5/i));
	},
	
	isWinVista: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return this.isWin(agent) && (agent.match(/nt\s*6/i));
	},
	
	// detect browser
	isWebKit: function(userAgent) {
        if(this._isWebKit === undefined) {
            var agent = userAgent || this.getAgent();
            this._isWebKit =  !!agent.match(/AppleWebKit/i);
            this.isWebKit = function() {return this._isWebKit};
        }
        return this._isWebKit;
	},
    
	isSafari2: function(userAgent) {
        if(this._isSafari2 === undefined) {
            if(!this.isWebKit()) this._isSafari2 = false;
            else {
                var ua = navigator.userAgent.toLowerCase(); 
               var version= parseInt(parseFloat( ua.substring( ua.lastIndexOf('safari/') + 7 ) ));
                this._isSafari2 = (version >= 419);
            }
            this.isSafari2 = function() {return this._isSafari2};
        }
        return this._isSafari2;
	},
	
	isOpera: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return !!agent.match(/opera/i);
	},
	
	isIE: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return !!agent.match(/msie/i);
	},
	
	isIEStrict: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return agent.match(/msie/i) && !this.isOpera(agent);
	},
	
	isFirefox: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return !!agent.match(/firefox/i);
	},

	//deprecated, use isMobile
	isiPhone: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return this.isMobile(agent);
	},
	
	isMobile: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return this.isWebKit(agent) && agent.match(/Mobile/i);
	},
	
	// itunes compabibility
	isiTunesOK: function(userAgent) {
		var agent = userAgent || this.getAgent();
		return this.isMac(agent) || this.isWin2k(agent);
	},
	
	isQTInstalled: function() {
		
		var qtInstalled = false;
		
		if(navigator.plugins && navigator.plugins.length) {
			
			for(var i=0; i < navigator.plugins.length; i++ ) {
				
				var plugin = navigator.plugins[i];
				
				if(plugin.name.indexOf("QuickTime") > -1) { 
					qtInstalled = true; 
				}
			}
		} else if (typeof(execScript) != 'undefined') {
			qtObj = false; //global variable written to by vbscript for ie
			execScript('on error resume next: qtObj = IsObject(CreateObject("QuickTimeCheckObject.QuickTimeCheck.1"))','VBScript');
			qtInstalled = qtObj;
		}
		
		return qtInstalled;
	},
	
	getQTVersion: function() {
		
		var version = "0";
		
		if (navigator.plugins && navigator.plugins.length) {
			for (var i = 0; i < navigator.plugins.length; i++) {
				
				var plugin = navigator.plugins[i];
				
				//Match: QuickTime Plugin X.Y.Z
				var match = plugin.name.match(/quicktime\D*([\.\d]*)/i);
				if (match && match[1]) {
					version = match[1];
				}
			}
		} else if (typeof(execScript) != 'undefined') {
			ieQTVersion=null;

			execScript('on error resume next: ieQTVersion = CreateObject("QuickTimeCheckObject.QuickTimeCheck.1").QuickTimeVersion','VBScript');

			if(ieQTVersion){
			    version = (ieQTVersion >> 24).toString(16);
			}
		}
		
		return version;
	},
	
	isQTCompatible: function(required, actual) {
		
		function areCompatible(required, actual) {
			
			var requiredValue = parseInt(required[0], 10);
			if (isNaN(requiredValue)) {
				requiredValue = 0;
			}
			
			var actualValue = parseInt(actual[0], 10);
			if (isNaN(actualValue)) {
				actualValue = 0;
			}
			
			if (requiredValue === actualValue) {
				if (required.length > 1) {
					return areCompatible(required.slice(1), actual.slice(1));
				} else {
					return true;
				}
			} else if (requiredValue < actualValue) {
				return true;
			} else {
				return false;
			}
		}

		var expectedVersion = required.split(/\./);
		var actualVersion = actual ? actual.split(/\./) : this.getQTVersion().split(/\./);
		
		return areCompatible(expectedVersion, actualVersion);
		
	},
	
	isValidQTAvailable: function(required) {
		return this.isQTInstalled() && this.isQTCompatible(required);
	}
	
};

//TODO load dependencies: browserdetect

//onDOMReady Event Extension
//http://clientside.cnet.com/code-snippets/event-scripting/a-dom-ready-extension-for-prototype/
Object.extend(Event, {
  _domReady : function() {
    if (arguments.callee.done) return;
    arguments.callee.done = true;

    if (this._timer)  clearInterval(this._timer);
    AC.isDomReady = true;
    if(this._readyCallbacks) this._readyCallbacks.each(function(f) { f() });
    this._readyCallbacks = null;
},
  onDOMReady : function(f) {
	if(AC.isDomReady) {
		f();
	}
    else {
		if (!this._readyCallbacks) {
			  var domReady = this._domReady.bind(this);
			  
			  if (document.addEventListener)
				document.addEventListener("DOMContentLoaded", domReady, false);
				
				/*@cc_on @*/
				/*@if (@_win32)
					document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
					document.getElementById("__ie_onload").onreadystatechange = function() {
						if (this.readyState == "complete") domReady(); 
					};
				/*@end @*/
				
				if (/WebKit/i.test(navigator.userAgent)) { 
				  this._timer = setInterval(function() {
					if (/loaded|complete/.test(document.readyState)) domReady(); 
				  }, 10);
				}
				
				Event.observe(window, 'load', domReady);
				Event._readyCallbacks =  [];
			}
			Event._readyCallbacks.push(f);
	  }
  }
});


if (typeof(AC) == "undefined") AC = {};

AC.decorateSearchInput = function(field, options) {
	
	var searchField = $(field);
	var standIn = null;

	var results = 0;
	var placeholder = '';
	var autosave = '';

	if(options) {
		
		if(options.results) { results = options.results; }
		if(options.placeholder) { placeholder = options.placeholder; }
		if(options.autosave) { autosave = options.autosave; }
		
	}
	
	if(AC.Detector.isWebKit()) {

        if(AC.Detector.isWin()) {
            searchField.addClassName('not-round');
        }

		searchField.setAttribute('type', 'search');
		if(!searchField.getAttribute('results')) {
			searchField.setAttribute('results', results);
		}
		
		if(null != placeholder) {
			searchField.setAttribute('placeholder', placeholder);
			searchField.setAttribute('autosave', autosave);
		}
		
	} else {
		
		//prevent browser from doing its own autocomplete, threw odd xul 
		//error on reset sometimes, although this feels a little
		//heavy handed
		searchField.setAttribute('autocomplete', 'off');
		
		//replace the field with a standin while we create the wrapper
		//we can't lose the reference to this field as other objects may
		//have already registered listeners on this field
		
		standIn = document.createElement('input');
		searchField.parentNode.replaceChild(standIn, searchField)

		var left = document.createElement('span');
		Element.addClassName(left, 'left');
	
		var right = document.createElement('span');
		Element.addClassName(right, 'right');
		
		var reset = document.createElement('div');
		Element.addClassName(reset, 'reset');
		
		var wrapper = document.createElement('div');
		Element.addClassName(wrapper, 'search-wrapper');
		
		var alreadyHasPlaceholder = field.value == placeholder;
		var isEmpty = field.value.length == 0;
		
		if (alreadyHasPlaceholder || isEmpty) {
			searchField.value = placeholder;
			Element.addClassName(wrapper, 'blurred');
			Element.addClassName(wrapper, 'empty');
		}
	
		wrapper.appendChild(left);
		wrapper.appendChild(searchField);
		wrapper.appendChild(right);
		wrapper.appendChild(reset);
	
		var focus = function() {
			
			var blurred = Element.hasClassName(wrapper, 'blurred');

			//need to check for flag AND placeholder lest somebody need to 
			//search for the placeholder text itself
			if(searchField.value == placeholder && blurred) {
				searchField.value = '';
			}
			
			Element.removeClassName(wrapper, 'blurred');
		}
		Event.observe(searchField, 'focus', focus);
		
		var blur = function() {
			
			if(searchField.value == '') {
				Element.addClassName(wrapper, 'empty');
				searchField.value = placeholder;
			}
			
			Element.addClassName(wrapper, 'blurred');
		}
		Event.observe(searchField, 'blur', blur);
		
		
		var toggleReset = function() {
			
			if(searchField.value.length >= 0) {
				Element.removeClassName(wrapper, 'empty');
			}
		}
		Event.observe(searchField, 'keydown', toggleReset);
	
	
		var resetField = function() {
			return( function(evt) {
				
				var escaped = false;
				
				if(evt.type == 'keydown') {
					if(evt.keyCode != 27) {
						return; //if it's not escape ignore it
					} else {
						escaped = true;
					}
				}
				
				searchField.blur(); //can't change value while in field
				searchField.value = '';
				Element.addClassName(wrapper, 'empty');
				searchField.focus();

			})
		}
		Event.observe(reset, 'mousedown', resetField());
		Event.observe(searchField, 'keydown', resetField());
	
		if (standIn) {
			standIn.parentNode.replaceChild(wrapper, standIn);
		}
		
	}
}

// this is called Element2 because
// adding methods to Element BLOWS UP IE7 
// for a reason I still haven't got to the bottom
// of.  It appears to be fine though, as long
// as you don't try to add additional methods
// to Element itself.
var Element2 = {};
Element2.Methods = {
	
	getInnerDimensions: function(element) {
    	
		element = $(element);
		var d = Element.getDimensions(element);
		
		var innerHeight = d.height;
		var styleOf = Element.getStyle;
		innerHeight -= styleOf(element, 'border-top-width') && styleOf(element, 'border-top-width') != 'medium' ? parseInt(styleOf(element, 'border-top-width'), 10) : 0;
		innerHeight -= styleOf(element, 'border-bottom-width') && styleOf(element, 'border-bottom-width') != 'medium' ? parseInt(styleOf(element, 'border-bottom-width'), 10) : 0;
		innerHeight -= styleOf(element, 'padding-top') ? parseInt(styleOf(element, 'padding-top'), 10) : 0;
		innerHeight -= styleOf(element, 'padding-bottom') ? parseInt(styleOf(element, 'padding-bottom'), 10) : 0;

		var innerWidth = d.width;
		innerWidth -= styleOf(element, 'border-left-width') && styleOf(element, 'border-left-width') != 'medium' ? parseInt(styleOf(element, 'border-left-width'), 10) : 0;
		innerWidth -= styleOf(element, 'border-right-width') && styleOf(element, 'border-right-width') != 'medium' ? parseInt(styleOf(element, 'border-right-width'), 10) : 0;
		innerWidth -= styleOf(element, 'padding-left') ? parseInt(styleOf(element, 'padding-left'), 10) : 0;
		innerWidth -= styleOf(element, 'padding-right') ? parseInt(styleOf(element, 'padding-right'), 10) : 0;

	    return {width: innerWidth, height: innerHeight};
	},
	
	/*
		Yes, we understand this is a hack. Safari is calculating margins for unpositioned elements
		as the total remaining viewport width
	*/
	getOuterDimensions: function(element) {
		element = $(element);
		var clone = element.cloneNode(true);
		
		document.body.appendChild(clone);
		Element.setStyle(clone, { position: "absolute", visibility: "hidden" });
		var d = Element.getDimensions(clone);
		
		var outerHeight = d.height;
		var styleOf = Element.getStyle;
		outerHeight += styleOf(clone, 'margin-top') ? parseInt(styleOf(clone, 'margin-top'), 10) : 0;
		outerHeight += styleOf(clone, 'margin-bottom') ? parseInt(styleOf(clone, 'margin-bottom'), 10) : 0;

		var outerWidth = d.width;
		outerWidth += styleOf(clone, 'margin-left') ? parseInt(styleOf(clone, 'margin-left'), 10) : 0;
		outerWidth += styleOf(clone, 'margin-right') ? parseInt(styleOf(clone, 'margin-right'), 10) : 0;

		Element.remove(clone);
		
		return {width: outerWidth, height: outerHeight};
	},
	
	removeAllChildNodes: function(element) {
		element = $(element);
		if(! element) { return; }
		
		while (element.hasChildNodes()) {
	  		element.removeChild(element.lastChild);
		}
	}
	
};

Object.extend(Element, Element2.Methods);




/**
* Omniture Tracking library
*/
if (typeof(AC) == "undefined") {
    AC = {};
}

if (typeof(AC.Tracking) == "undefined") {
    AC.Tracking = {};
}

AC.Tracking.getLinkClicked = function(target)
{
    if (!target) {
        return null;
    }

    while (target.nodeName.toLowerCase() != 'a' && target.nodeName.toLowerCase() != 'body') {
        target = target.parentNode;
    }

    if (!target.href) {
        target = null;
    }

    return target;
}

AC.Tracking.trackLinksWithin = function(container, test, title, properties, options)
{
    $(container).observe('mousedown', function(evt) {

        var target = AC.Tracking.getLinkClicked(Event.element(evt));

        if (target && test(target)) {

            if (options && options.beforeTrack) {
                // provides a way to alter the properties or the title in some way for the mousedown
                // most felixble way to capture what link was actually clicked or whatever else
                // you want at the time of the event
                var altered = options.beforeTrack(target, title, properties);
                if (altered) {
                    title = altered.title;
                    properties = altered.properties;
                }
            }

            AC.Tracking.trackClick(properties, this, 'o', title);
        }

    });
}

/**
 * Effectively tags all links within a container conforming to the supplied 
 * test function reference with the specified key and value.
 * 
 * The test argument should be a function reference expecting the link as 
 * its first and only parameter. It should simply return true or false 
 * indicating whether the link should be tagged or not.
 */
AC.Tracking.tagLinksWithin = function(container, key, value, test)
{
    $(container).observe('mousedown', function(evt) {

        var link = Event.element(evt);

        if (!link) {
            return;
        }

        while (link.nodeName.toLowerCase() != 'a' && link.nodeName.toLowerCase() != 'body') {
            link = link.parentNode;
        }

        if (link.href && test(link)) {
            AC.Tracking.tagLink(link, key, value);
        }

        link = null;
    })
}

/**
 * Appends the specified key and value to the querystring of the supplied 
 * anchor's href attribute.
 */
AC.Tracking.tagLink = function(link, key, value)
{
    var href = link.getAttribute('href');

    if (href.match(/\?/)) {
        var params = href.toQueryParams();
        params[key] = value;
        href = href.split(/\?/)[0] + '?' + $H(params).toQueryString();
    } else {
        href += '?' + key + '=' + value;
    }

    link.setAttribute('href', href);
}

AC.Tracking.s_vi = function()
{
    var cookies = document.cookie.split(';'),
        s_vi = null,
        match;

    for (var i = 0, cookie; (cookie = cookies[i]); i++) {
        match = cookie.match(/^\s*s_vi=\[CS\]v1\|(.+)\[CE\]\s*$/);
        if (match) {
            s_vi = match[1];
            break;
        }
    }

    return s_vi;
}

/**
 * Makes a tracking request
 * 
 * Note: Typically you won't need to call this directly, instead you should
 * track events using either TrackClick or TrackPage whihc provide more
 * friendly interfaces to this method 
 * 
 * @trackingMethod the method of Omniture tracking to use
 * @properties associative array of property names and their associated values to track
 * @options associate array of options to use in this tracking context, 
 * 	some of these are required depending upon the trackingMethod you have chose
 */
AC.Tracking.track = function(trackingMethod, properties, options)
{
    if (typeof(s_gi) == 'undefined' || !s_gi) {
        return;
    }

    options = options || {};

    //use existing tracking account if available, or use one from the options
    if (typeof(s_account) != 'undefined') {
        s = s_gi(s_account)
    } else if (options.s_account){
        s = s_gi(options.s_account);
    } else {
        return;
    }

    if (trackingMethod == s.tl) {

        var linkTrackVars = ''

        for (var key in properties) {
            linkTrackVars += key + ',';
        }
        linkTrackVars = linkTrackVars.replace(/,$/, '');

        s.linkTrackVars = linkTrackVars;
    } else {
        s.linkTrackVars = '';
    }

    //clear properties set by default within a page
    s.prop4 = "";
    s.g_prop4 = "";
    s.prop6 = "";
    s.g_prop6 = "";
    s.pageName = "";
    s.g_pageName = "";
    s.pageURL = "";
    s.g_pageURL = "";
    s.g_channel = "";

    var sanitize = function(value) {
        if (typeof(value) == "string") {
            return value.replace(/[\'\"\“\”\‘\’]/g, '');
        } else {
            return value;
        }
    }

    for (var key in properties) {

        s[key] = sanitize(properties[key]);

        if (key == 'events') {
            s.linkTrackEvents = sanitize(properties[key]);
        }
    }

    if (trackingMethod == s.t) {
        void(s.t());
    } else {
        s.tl(options.obj, options.linkType, sanitize(options.title));
    }

    for (var key in properties) {
        if (key != 'pageName') {
            s[key] = '';
        }
        if (key == 'events') {
            s.linkTrackEvents = 'None';
        }
    }

},

/**
 * Uses the Omniture s.tl Tracking method to track a "click"
 * 
 * @properties associative array of params and associated values
 * @obj object for context, usually "this"
 * @linkType type of link for Omniture usually 'o'
 * @title human readable title for this link that shows up in reports
 * @options associative array of options to apply to this tracking context (currently no valid options are available)
 */
AC.Tracking.trackClick = function(properties, obj, linkType, title, options)
{
    var options = {
        obj: obj,
        linkType: linkType,
        title: title
    };

    AC.Tracking.track(s.tl, properties, options);
},

/**
 * Uses the Omniture s.t Tracking method to track a "page load"
 * 
 * @properties associative array of params and associated values
 * @options associative array of options to apply to this tracking context
 */
AC.Tracking.trackPage = function(properties, options)
{
	AC.Tracking.track(s.t, properties, options);
}





Element.Methods.childNodeWithNodeTypeAtIndex = function(element, nodeType,index) {
	var node = element.firstChild;
    if (!node) return null;
	var i=0;
    while (node) {
		if(node.nodeType === nodeType) {
			if(index === i) {
				return node;
			}
			i++;
		}
		node = node.nextSibling;
	}
    return null;
};



/* String Extensions Begin */
String.prototype.lastPathComponent = function() {
	var index = this.lastIndexOf("/");
	if(index != -1) {
		return this.substring(index+1,this.length-1);
	}
	else return null;
}

String.prototype.stringByDeletingLastPathComponent = function() {
	var index = this.lastIndexOf("/");
	if(index != -1) {
		return this.slice(0,index);
	}
	else return null;
}

String.prototype.stringByAppendingPathComponent = function(value) {
 	return (this.lastIndexOf("/") !== (this.length-1)) ? (this+"/"+value) : (this+value);
}

String.prototype.stringByRemovingPrefix = function(value) {
	var index = this.indexOf(value);
	if(index > -1) {
		var result = this.substring(index+value.length,this.length);
		return result;
	}
	else {
		return this;
	}
}
String.prototype.pathExtension = function() {
	var lastPathComponent = this.lastPathComponent();
	var index = lastPathComponent.lastIndexOf(".");
	if(index != -1) {
		return lastPathComponent.slice(index,lastPathComponent.length);
	}
	else return "";
}


/* String Extensions End */

/* Array Extensions Begin */

Array.prototype.addObjectsFromArray = function(array) {
	if(array.constructor === Array) {
		this.push.apply(this,array);
	}
	else {
		for(var i=0,item;(item = array[i]);i++) {
			this[this.length] = item;
		}
	}
}

//To let an array behave like a node list
Array.prototype.item = function(index) {
	return this[index];
}
 
/* Array Extensions End */


document._importNode = function(node, allChildren) {
	/* find the node type to import */
	if (node.nodeType === Node.ELEMENT_NODE) {
			/* create a new element */
			var newNode = document.createElement(node.nodeName);
			var i, il;
			/* does the node have any attributes to add? */
			if (node.attributes && node.attributes.length > 0)
				/* add all of the attributes */
				var nodeAttributes = node.attributes;
				var iNodeName, iNodeValue;
				for (i = 0, il = node.attributes.length; i < il;) {
					iNodeName = nodeAttributes[i].nodeName;
					iNodeValue = node.getAttribute(nodeAttributes[i++].nodeName);
					if(iNodeName === "class") {
						//iNodeName = "className";
						newNode.setAttribute("className", iNodeValue);
					}
					newNode.setAttribute(iNodeName, iNodeValue);
				}
			/* are we going after children too, and does the node have any? */
			if (allChildren && node.childNodes && node.childNodes.length > 0){
				/* recursively get all of the child nodes */
				for (i = 0, il = node.childNodes.length; i < il;)
					newNode.appendChild(document._importNode(node.childNodes[i++], allChildren));
			}
			return newNode;
	}
		else if (node.nodeType === Node.TEXT_NODE) {
			return document.createTextNode(node.nodeValue);
		}
		else if(node.nodeType === Node.COMMENT_NODE) {
			return document.createComment(node.nodeValue);
		}
		else if(node.nodeType === Node.CDATA_SECTION_NODE) {
			return document.createCDATASection(node.nodeValue);
		}
		else return null;
};
if(!document.importNode) {
	document.importNode = document._importNode;
}

if(AC.Detector.isIEStrict()) {

	Element.Methods.hasAttribute = function(element, attributeName ) {
		if ( attributeName == "class") attributeName = "className";
		else if(attributeName == "for") attributeName = "htmlFor";
		var result = element.getAttribute(attributeName);
		return ((result != null) && (result !== ""));
		
	};

	document._getElementsByName = document.getElementsByName;
	document._HTMLElementsWithName = ["a","apple","button","form","frame","iframe","img","input","object","map","meta","param","textarea","select"];

	document.getElementsByName = function(name) {
		var _HTMLElementsWithName = this._HTMLElementsWithName;
		var result = [], ieResult, i, iNode;
		for(var e=0, element;(element = _HTMLElementsWithName[e]);e++) {
			ieResult = document.getElementsByTagName(element);
			for(i = 0;(iNode=ieResult[i]); i++) {
				if(iNode.name === name) {
					 result[result.length] = iNode;
				}
			}
		}

		return result;
	}
}

Event.onDOMReady(function() {
	
	var inputs = document.getElementsByTagName('input');
	
	for (var i = 0; i < inputs.length; i++) {
		var input = $(inputs[i])
		if(input.hasClassName('prettysearch')) {
			
			var options = {};
			
			//these are unique autosave names for globally used
			//autosave collections
			
			//after decoration you can simply:
			//	field.setAttribute('autosave', 'autosaveName');
			
			if(input.hasClassName('applesearch')) {
				options.autosave = 'Apple.com';
			} else if (input.hasClassName('reseller')) {
				options.autosave = 'Apple.com Reseller';
			}
			
			if(input.parentNode.tagName == 'LABEL') {
				
				var placeholderText = "";
				
				var labelElement = input.up().getElementsByClassName('prettyplaceholder')[0];
				
				//either grab text in a classed element
				if(labelElement) {
					placeholderText = labelElement.innerHTML;
				
				//or grab text from right inside the label
				} else {
					placeholderText = input.parentNode.firstChild.nodeValue;
					input.parentNode.firstChild.nodeValue = '';
				}
				
				placeholderText = placeholderText.split('\n')[0];
				options.placeholder = placeholderText;

			}
			
			AC.decorateSearchInput(input, options);
		}
	}	
});
//
// iTunes Client Detection code
//
// This javascript library is tied intimately to MHBrowserRedirect.
// Note also that the iTunes U team links to this file on phobos, so check w/ Sugam before changing it.
//
// @author Mark Miller

var BROWSER_SAFARI = 1;
var BROWSER_FIREFOX = 2;
var BROWSER_INTERNET_EXPLORER = 3;
var BROWSER_OTHER = 4;

var ITUNES_INSTALLED_COOKIE_NAME="iTunesPresent";

function iTunesDetected() {

  // if we've already figured out that iTunes is present, rely on that data:
  if ('true' == getCookie(ITUNES_INSTALLED_COOKIE_NAME)) return true;

  // If we are on the Mac, assume that iTunes is installed.
  if (-1 != navigator.userAgent.indexOf("Macintosh")) return true;

  if (BROWSER_INTERNET_EXPLORER == detectedBrowser()) {
    return iTunesActiveXComponentInstalled();
  }
  
  // last chance:
  return iTunesMozillaPluginDetected();
}

function detectedBrowser() {
  if (-1 != navigator.userAgent.indexOf("AppleWebKit")) return BROWSER_SAFARI;
  if (-1 != navigator.userAgent.indexOf("Firefox")) return BROWSER_FIREFOX;
  if (-1 != navigator.userAgent.indexOf("MSIE ")) return BROWSER_INTERNET_EXPLORER;
  else return BROWSER_OTHER;
}

/**
 * We interpret the presence of the iTunes ActiveX Component to mean that iTunes itself has been installed.
 * @return true if the iTunes ActiveX Component was successfully loaded.
 */
function iTunesActiveXComponentInstalled() {
  var detectObj = document.getElementById('iTunesDetectorIE');
  var returnVal = false; // If we can't load the ActiveX control, assume we do not have ITMS

  if ((detectObj != null) && (typeof(detectObj) != "undefined")) {
    if (typeof(detectObj.IsITMSHandlerAvailable) != "undefined") {
      returnVal = detectObj.IsITMSHandlerAvailable;
      dbg(typeof(detectObj.IsITMSHandlerAvailable));
    }

    if ((returnVal == null) || (typeof (returnVal) == "undefined")) returnVal = false;
  }
  dbg("ActiveX Control result: " + returnVal);
  return returnVal;
}

/**
 * We interpret the presence of the iTunes Firefox plugin to mean that iTunes itself has been installed.
 * @return true if the iTunes Firefox plugin was successfully loaded.
 */
function iTunesMozillaPluginDetected() {
  var result = false;
  if (navigator.plugins && navigator.plugins.length > 0) {
    for (var i=0; i < navigator.plugins.length; i++ ) {
      var plugin = navigator.plugins[i];
      var pluginName = plugin.name;
      if (pluginName.indexOf("iTunes Application Detector") > -1) { result = true }
    }
  }
  info("FF plugin detected: " + result);
  return result;
}

/**
 * This is the main entry point from WebObjects code.  See MHBrowserRedirect.java
 *
 * @param url the url to open if iTunes is installed
 * @param downloadUrl the url to go to to download iTunes
 * @param overridePanelId the id to unhide if the browser is firefox/opera.
 * @param noClose if true, don't close the browser window after opening iTunes.
 */
function itmsOpen(url, downloadUrl, overridePanelId, noClose) {
  if (null != getCookie('recentlyRedirected')) noClose = true;
  setCookie('recentlyRedirected', true, 4000);

  if (iTunesDetected()) {
    setCookie(ITUNES_INSTALLED_COOKIE_NAME, true, 9999999999); 

    if (noClose) {
      //info("itmsOpen(): Opening " + url + "\nThis window will remain open.");
      // we can't set window.location.href directly because the current page will not
      // be rendered (at least in Safari 416.12).  The odd thing is that even a window.alert()
      // hides this bug, if it is a bug.
      setTimeout('window.location.href = "'+url+'"', 1);
      return true;
    } else {
      return replaceCurrentPageWithUrl(url);
    }
  }
  else {
    if (BROWSER_INTERNET_EXPLORER == detectedBrowser()) {
      // take IE users straight to the download page because we're sure they don't
      // have iTunes installed (they would have had the ActiveX component show up)
      window.location.replace(downloadUrl);
    }
    else { // for all other browsers, let the user tell us if iTunes is installed:
      document.getElementById(overridePanelId).style.display='block';
    }
  }
  return true;
}

/**
 * Open the given url (using iTunes) and make a best effort to close or go back in the current window.
 */
function replaceCurrentPageWithUrl(url) {

  window.location.href = url;

  info("Window History Length: " + window.history.length);
  if (window.history.length < 2) {
    setTimeout('window.close()', 100);
  } else {
    setTimeout('window.history.back()', 100);
  }
  return true;
}

function setCookie(cookieName,cookieValue,ttlMillis) {
  var expire = new Date();
  expire.setTime(expire.getTime() + ttlMillis);
  var cookie = cookieName + "=" + escape(cookieValue) + "; expires=" + expire.toGMTString();
  info("setCookie(): " + cookie);
  document.cookie = cookie;
}

function getCookie(cookieName) {
  if (null == document.cookie || null == cookieName) return null;
  var cookies = document.cookie.split(';');
  var result = null;
  for (var i=0; i < cookies.length; i++) {
    var c = cookies[i];
    var keyValue = c.split('=');
    if (-1 < keyValue[0].indexOf(cookieName)) {
      result = unescape(keyValue[1]);
      break;
    }
  }
  info("getCookie(" + cookieName + "): " + result);
  return result;
}

function dbg(str) {
//  return alert(str);
}

function info(str) {
//  return alert(str);
}

/**
  *  Event Mixins
  *  (c) 2006 Seth Dillingham <seth.dillingham@gmail.com>
  *
  *  This software is hereby released into the public domain. Do with it as
  *  you please, but with the understanding that it is provided "AS IS" and 
  *  without any warranty of any kind.
  *  
  *  (But I'd love to be told about where and how this code is being used.)
  **/
  
/**
  *  Description:
  *    add support (to any object or class) by mixing this class into your own
  *  
  *  Requires prototype.js
  *  
  *  Usage:
  *    To publish custom events:
  *      1. mix this class with your own via
  *         Object.extend( [your class or prototype], Event.Publisher )
  *      2. post events by calling
  *         this.dispatchEvent( [event name], [data for event] )
  *   
  *    To activate and deactivate the event-tracing feature, just call 
  *      this.toggleEventsTrace()
  **/

Event.Publisher = Class.create();
Object.extend( Event.Publisher, {
	_ls_event_targets: null,
	
	_event_source_id: null,
	
	_fl_trace_events: false,
	
	getEventSourceId: function() {
		if ( typeof this._event_source_id == 'function' )
			return this._event_source_id();
		else
			return this._event_source_id;
	},
	
	getEventTarget: function( event_name ) {
		if ( ! this._ls_event_targets )
			this._ls_event_targets = new Array();
		
		if ( ! this._ls_event_targets[ event_name ] )
			document.body.appendChild(
				this._ls_event_targets[ event_name ] = document.createElement( 'A' )
			);
		
		return this._ls_event_targets[ event_name ];
	},
	
	addEventListener: function( event_name, callback_func, capturing ) {
		var targ = this.getEventTarget( event_name );
		
		Event.observe( targ, 'click', callback_func, capturing );
		
		if ( this._fl_trace_events ) {
			var data =  {
				publisher: this.getEventSourceId(),
				event_name: event_name,
				listener: callback_func,
				capturing: capturing,
				event_source_proxy: targ
			};
			
			this.dispatchEvent( 'eventListenerAdded', data, true, true );
		}
	},
	
	removeEventListener: function( event_name, callback_func, capturing ) {
		var targ = this.getEventTarget( event_name );
		
		Event.stopObserving( targ, 'click', callback_func, capturing );
		
		if ( this._fl_trace_events ) {
			var data =  {
				publisher: this.getEventSourceId(),
				event_name: event_name,
				listener: callback_func,
				capturing: capturing,
				event_source_proxy: targ
			};
			
			this.dispatchEvent( 'eventListenerRemoved', data, true, true );
		}
	},
	
	dispatchEvent: function( event_name, data, can_bubble, cancelable ) {
		var targ = this.getEventTarget( event_name );
		var event_data = {
			event_name: event_name,
			event_target: this,
			data: data ? data : null
		};
		
		if ( ! can_bubble ) can_bubble = false;
		if ( ! cancelable ) cancelable = false;
		
		var event = Event.create( event_data, can_bubble, cancelable, true, targ );
		
		if ( this._fl_trace_events ) {
			if ( event_name.match( /event(?:ListenerAdded|ListenerRemoved|Dispatched|Received)/ ) )
				return;
			
			var data =  {
				publisher: this.getEventSourceId(),
				event_name: event_name,
				event_data: event_data,
				can_bubble: can_bubble,
				cancelable: cancelable,
				event_source_proxy: targ,
				result: event
			};
			
			this.dispatchEvent( 'eventDispatched', data, true, true );
		}
	},
	
	toggleEventsTrace: function() {
		var trace = Event.Tracer.findTracer();
		
		if ( ! trace || ! this._fl_trace_events ) {
			this._fl_trace_events = true;
			
			trace = Event.Tracer.startTrace();
			
			trace.registerPublisher( this );
		}
		else {
			this._fl_trace_events = false;
			
			if ( trace )
				trace.unregisterPublisher( this );
		}
		
		return this._fl_trace_events;
	},
	
	isEventsTraceActive: function() {
		return this._fl_trace_events;
	}
} );

/**
  *  MIX IN: Event.Listener
  *  
  *  Description:
  *    easily add support for receiving totally custom events
  *    (to any object or class) by mixing this class into
  *    your own
  *  
  *  Usage:
  *	   To receive custom events:
  *      1. mix this class with your own via
  *         Object.extend( [your class or prototype], EventListener )
  *      2. listen for events by calling (from your object)
  *         this.listen()
  *         (see params for this.listen, below)
  **/
Event.Listener = Class.create();
Object.extend( Event.Listener,
{
	_listens: null,
	
	getEventHandlerName: function( event_name ) {
		var onEvent_name = event_name.split( /[ _]/ ).join( '-' ).camelize();
		
		return "on" + onEvent_name.charAt( 0 ).toUpperCase() + onEvent_name.substr( 1 );
	},
	
	/**
	  *	 Params:
      *    event_source [object]:
      *      the object which will generate the events, and which implements (or
      *      mixes in) the Event.Publisher interface (we need addEventListener)
      *    event_name [string]:
      *      the name of the event for which your object will listen
      *    use_capture [boolean]:
      *      standard DOM Event API param
      *    onEvent_name [string]:
      *      the name of the method in your object which will be called when the
      *      event is received if you omit this param, listen will look for a
      *      function named with the CapitalizedCamelCased name of the event with
      *      "on" at the front. So, if the event is named "message_received",
      *      we'll look for a function named "onMessageReceived" You can override
      *      this behavior by overriding getEventHandlerName in your object.
	  **/
	listenForEvent: function( event_source, event_name, use_capture, onEvent_name ) {
		if ( ! onEvent_name )
			onEvent_name = this.getEventHandlerName( event_name );
		
		if ( ! this._listens ) this._listens = new Array();
		
		//added this in to allow for anonymous function handling of an event
		var eventHandler = this[onEvent_name];
		
		if(typeof(onEvent_name) == 'function') {
			eventHandler = onEvent_name;
		}
		
		var cb = eventHandler.bindAsEventListener( this );
		this._listens.push( [ event_source, event_name, use_capture, onEvent_name, cb ] )
		
		event_source.addEventListener( event_name, cb, use_capture );
	},
	
	stopListeningForEvent: function( event_source, event_name, use_capture, onEvent_name ) {
		if ( ! this._listens ) return false;
		
		if ( ! onEvent_name )
			onEvent_name = this.getEventHandlerName( event_name );
		
		var ix_item = -1;
		var ls = this._listens.detect( function( val, ix ) {
			if ( ( val[ 0 ] == event_source )
			  && ( val[ 1 ] == event_name )
			  && ( val[ 2 ] == use_capture )
			  && ( val[ 3 ] == onEvent_name ) ) {
				ix_item = ix;
				return true;
			}
		} );
		
		if ( ix_item >= 0 ) {
			this._listens.splice( ix_item, 1 );
			
			event_source.removeEventListener( event_name, ls[ 4 ], use_capture );
			
			return true;
		}
		
		return false;
	}
} );

/**
  *  Extensions to Prototype's Event object,
  *  for cleanly creating and dispatching custom events
  *  
  *  Called from Event.Publisher
  **/
Object.extend( Event,
{
	create: function( event_data, can_bubble, cancelable, fl_dispatch, target ) {
		var event;
		
		if ( document.createEvent ) {  // gecko, safari
			if ( ! can_bubble ) can_bubble = false;
			if ( ! cancelable ) cancelable = false;
			
			if ( /Konqueror|Safari|KHTML/.test( navigator.userAgent ) ) {
				event = document.createEvent( 'HTMLEvents' )
				
				event.initEvent( 'click', can_bubble, cancelable );
			}
			else {  // gecko uses MouseEvents
				event = document.createEvent( 'MouseEvents' )
				
				event.initMouseEvent( "click", can_bubble, cancelable,
				                      window, 0, 0, 0, 0, 0,
				                      false, false, false, false, 0, null );
			}
		}
		else {  // msie
			event = document.createEventObject();
			event.event_type = 'onclick';
		}
		
		event.event_data = event_data;
		
		if ( fl_dispatch )
			Event.dispatch( target, event );
		
		return event;
	},
	
	dispatch: function( target, event ) {
		if ( document.createEvent )
			return target.dispatchEvent( event );
		else
			return target.fireEvent( ( typeof( event.event_type ) != "undefined" ) ? event.event_type : 'onclick', event );
	}
} );


// = Apple.com SwapView Library =
//
// Library for swapping between content in a single container element
// by triggers in the document, programmatically, or automatically over time.
if (typeof(AC) === 'undefined') { AC = {}; }

if (typeof(document.event) === 'undefined') { document.event = {}; }

if (Event.Publisher) { Object.extend(document.event, Event.Publisher); }

// == AC.SwapView ==
//
// Class that manages inserting, replacing, and removing content from a single
// element in the DOM.
//
// ==== Delegate Methods ====
// * {{{willClose(swapView, currentContent)}}}: The swap view is about to
//      swap out the specified content.
//
// * {{{isContentLoaded(swapView, content)}}}: Is the specified content
//      loaded and ready for insertion into the DOM?
//
// * {{{loadContent(swapView, content)}}}: Load the specified content such that
//      it is displayable within the DOM. The delegate is expected to call
//      {{{setLoadedContent}}} when finished to let the swapView know when
//      the content is ready.
//
// * {{{didAppendContent}}}
// 
// * {{{shouldAnimateContentChange}}}
// 
// * {{{willAnimate}}}
// 
// * {{{didShow}}}
AC.SwapView = Class.create({

    _view: null,
    currentContent: null,
    delegate: null,

    // ** {{{AC.SwapView.initialize(view)}}}
    //
    // Initializes a swap view object that will allow swapping content within
    // the specified {{{view}}} element.
    // 
    // {{{view}}}: the element or ID of an element to interact with.
    // This element will have the classname {{{swapView}}} appended.
    initialize: function(view)
    {
        if(typeof view === "string") {
            this._viewId = view;
        } else {
            this._view = $(view);
            this._resetView();
        }

    },

    // ** {{{AC.SwapView.view()}}}
    // 
    // Returns the receiver's view element or null if there is none available.
    view: function()
    {
        if (!this._view) {
            this._view = $(this._viewId);
            this._resetView();
        }
        return this._view;
    },

    // Removes child nodes from the view and applies any relevant classNames
    _resetView: function()
    {
        if (!this._view) {
            return;
        }

        var childNodes = this._view.childNodes, aChildNode;
        while (aChildNode = childNodes[0]) {
            this._view.removeChild(aChildNode);
        }
        this._view.addClassName('swapView');
    },

    // ** {{{AC.SwapView.setDelegate(delegate)}}} **
    //
    // Sets the delegate of the receiver.
    // 
    // {{{delegate}}}: The object to set as the receiver's delegate
    setDelegate: function(delegate)
    {
        this.delegate = delegate;
    },

    // ** {{{AC.SwapView.setContent(content)}}} **
    // 
    // Initiates showing the specified content in the receiver's view element.
    // 
    //  {{{content}}}: The content to show in the receiver's view element.
    // 
    // 
    // If there is any current content the delegate will receive
    // a {{{willClose}}} message.
    // 
    // If content is specified and there is no delegate, or if content is
    // provided and the delegate reports {{{isContentLoaded}}} as true, then
    // setLoadedContent is immediatley called to actually load the content
    // into the view.
    // 
    // If content is specified but the delegate reports {{{isContentLoaded}}}
    // as false the delegate is sent the {{{loadContent}}} message. It is
    // then up to the delegate to load the content and call
    // {{{setLoadedContent}}}.
    setContent: function(content)
    {
        if (content === this.currentContent) {
            return;
        }

        if (this.currentContent && typeof(this.delegate.willClose) === 'function') {
            this.delegate.willClose(this, this.currentContent);
        }

        if (content && typeof(this.delegate.isContentLoaded) === 'function') {
            if (!this.delegate.isContentLoaded(this, content)) {
                if (typeof(this.delegate.loadContent) === 'function') {
                    this.delegate.loadContent(this, content);
                    // Stop if delegate needs to actually load content
                    return;
                }
            }
        }
        this.setLoadedContent(content);
    },

    // ** {{{AC.SwapView.setLoadedContent(content)}}} **
    //
    // Actually shows the specified content in the receiver's view element.
    //
    //  {{{content}}}: The content to show in the receiver's view element.
    //
    // If the delegate responds to {{{shouldAnimateContentChange}}} as true,
    // it is usually a good idea to position the content of the swap view
    // absolutley so the animations have free reign to position and animate
    // the content.
    //
    // willClose is called when initiating a content swap so we can inform
    // a section it's about to close prior to trying to load the remote content
    // which can take a while and make this feel slower than it is.
    //
    // This does mean that if the new content fails to load we need to handle
    // that pretty well becasue the existing content was already told it was
    // going to close.
    //
    // //TODO//
    // Additionally you will only get the willClose call by going through
    // setContent. This indicates to me that setLoadedContent should never
    // be exposed as part of the public API. I'd suggest prefixing
    // it with an underscore to purvey the "private" nature of this method.
	setLoadedContent: function(content) {

        if (typeof(this.delegate.willShow) === 'function') {
            content = this.delegate.willShow(this, this.currentContent, content);
        }

        var shouldAnimate = true,
            animation;
        if (typeof(this.delegate.shouldAnimateContentChange) === 'function') {
            shouldAnimate = this.delegate.shouldAnimateContentChange(this, this.currentContent, content);
        }

        if (shouldAnimate && typeof(this.delegate.willAnimate) === 'function') {
            //While animating we can assume we'll need both outgoing and
            //incoming content in the view at the same time, so just
            //append the incoming content prior to the animation

            //Note that in this case the content of the swapview should be
            //positioned absolutely so we can layer them on top of each other
            //if you can't accommodate that then respond with a false for
            // shouldAnimateContentChange in your delegate and you'll rely
            // on the immediate swapping
            this.didAnimate = true;
            if (this.view() && content && this.currentContent !== content) {
                this.view().appendChild(content);
            }

            if (typeof(this.delegate.didAppendContent) === 'function') {
                this.delegate.didAppendContent(this, content);
            }

            animation = this.delegate.willAnimate(this, this.currentContent, content, this.didShow.bind(this, content));
        } else {

            this.didAnimate = false;
            //With no animation we don't assume both nodes are ever in the view at the same time
            //so remove the current content before appending the incoming content
            if(this.currentContent !== content) {
                if (this.currentContent && this.currentContent.parentNode) {
                    this.currentContent.parentNode.removeChild(this.currentContent);
                }

                if(content) {
                    this.view().appendChild(content);
                }

                if (typeof(this.delegate.didAppendContent) === 'function') {
                    this.delegate.didAppendContent(this, content);
                }
            }

            if(content) {
                $(content).setOpacity(1.0);
            }

            this.didShow(content);
        }
    },

    // ** {{{AC.SwapView.didShow(content)}}} **
    //
    // Acknowledges the reciever did show the specified content.
    // 
    // {{{content}}}: The content that has just been shown.
    // 
    // This is done immediately after the content was inserted with no
    // animation or immediately after the animation has finished.
    didShow: function(content)
    {
        //Pull the existing content out of the DOM, if it hasn't been already
        if (this.currentContent && (this.currentContent !== content) && this.currentContent.parentNode) {
            this.currentContent.parentNode.removeChild(this.currentContent);
        }

        if (typeof(this.delegate.didShow) === 'function') {
            this.delegate.didShow(this, this.currentContent, content);
        }

        this.currentContent = content;
    }

});


// == AC.ViewMaster ==
//
// The ViewMaster listens for triggers being activated on the page to show
// the trigger's content inside a {{{swapView}}}
//
//
// === Delegate Methods & Notifications ===
// * {{{willShow(sender, outgoingView, incomingView)}}} method and {{{ViewMasterWillShowNotification}}} event
//
// * {{{didShow(sender, outgoingView, incomingView)}}} method and {{{ViewMasterDidShowNotification}}} event
//
// * {{{willClose(sender, outgoingView, incomingView)}}} method and {{{ViewMasterWillCloseNotification}}} event
//
// * {{{shouldAnimateContentChange(sender, outgoingView, incomingView)}}} method
//
// * {{{willAnimate(sender, outgoingView, incomingView, afterFinish, queueScope)}}} method
//
// * {{{didAppendContent(sender, content)}}} method
if (typeof(AC.ViewMaster) === 'undefined') { AC.ViewMaster = {}; }

AC.ViewMaster.Viewer = Class.create({
    view: null,
    triggerClassName: null,
    currentSection: null,
    requestedSection: null,
    sections: null,
    orderedSections: null,

    _locked: false,
    _didShowInitial: false,

    options: null,

    // ** {{{AC.ViewMaster.initialize(contents, view, triggerClassName, options)}}} **
    //
    // Initializes a new ViewMaster instance.
    //
    // {{{contents}}}: The elements to make available for swapping in and out
    // of the viewmaster. Can be, and often is, set to null for lazy and remote loading.
    //
    // {{{view}}}: The view element to use for swapping content into and out of.
    //
    // {{{triggerClassName}}}: The class name trigger links are expected to have.
    // Each ViewMaster instance on a document needs to have its own unique
    // triggerClassName.
    //
    // {{{options}}}: optional associative array of configuration options
    //
    //
    // TODO the animation stuff should probably be moved out into the swap_view...
    //
    // === Allowed Options ===
    // * {{{triggerEvent}}}: The name of the event to listen for from valid
    //   triggers.
    //
    // * {{{initialId}}}: The Id of the initial section to load and show.
    //   Note that this is overridden if an id is specified in the URL hash.
    //   If neither is found, the first section discovered in {{{contents}}}
    //   is shown initially.
    //
    // * {{{silentTriggers}}}: Whether or not to suppress following activated
    //   triggers such that their #target does not appear in the URL.
    //
    // * {{{sectionRegExp}}}: The regex to use when trying to identify the
    //   section specified in the trigger's href attribute.
    // 
    // * {{{ensureInView}}}: Whether or not to ensure a section is made
    //   visible in the viewport if it wouldn't normally be within the
    //   viewport after opening.
    //
    // * {{{shouldAnimateContentChange}}}: Whether or not to animate content
    //   transitions.
    //
    // * {{{animationDuration}}}: The duration of the default animation.
    initialize: function(contents, view, triggerClassName, options)
    {
        if (triggerClassName) {
            this.triggerClassName = triggerClassName;
        }
        this.sections = $H();
        this.orderedSections = [];

        this.options = options || {};

        this.triggerEvent = this.options.triggerEvent || 'click';

        var initialSection = null,
            section,
            i;
        if (contents) {
            for (i = 0; i < contents.length; i++) {
                //contents could be a NodeList, so we're going to use that API
                //I added an item method to Array in apple_core
                section = this.addSection(contents.item(i));

                if (!initialSection) {
                    initialSection = section;
                }
            }
        }
        //Moved down to workaround a bug: in Safari, the results of getElementsByClassName is a NodeList.
        //If we do new AC.SwapView(view) before looping on the NodeList, the NodeList get emptied....
        this.view = new AC.SwapView(view);
        this.view.setDelegate(this);

        var hashInitialId = document.location.hash,
            hashSection,
            hashSectionIdMatch;

        this.sectionRegExp = this.options.sectionRegExp || new RegExp(/#(.*)$/);

        // TODO the default regex may need some stricter ending, much like the trigger matching

        // Inspect the URL for what appears to be the specified section ID according to the sectionRegExp
        hashSectionIdMatch = hashInitialId.match(this.sectionRegExp);

        if (hashSectionIdMatch && hashSectionIdMatch[1]) {
            // if we find a group that matches the id within the hash, use it as the id
            hashInitialId = hashSectionIdMatch[1];
        }

        if (hashInitialId !== this.view._viewId) {

            // To prevent loading an arbitrary element into the viewmaster
            // check to see if any of the valid triggers on the page at this 
            // time reference that id
            // if no triggerlinks reference this id, we ignore this initial id
            // TODO determine effect on remote sections which may not have
            // triggers linking to them in the page yet
            // Theoretically you can still show a section with no referencing
            // triggers manually, this jsut prevents false positives
            var triggerLinks = document.getElementsByClassName(this.triggerClassName),
                trigger;
            for (i = 0, trigger; (trigger = triggerLinks[i]); i++) {
                if (trigger.getAttribute('href').match(new RegExp("#" +hashInitialId+ "(?![\_\w\-])"))) {

                    hashSection = this.sectionWithId(hashInitialId);

                    if (hashSection) {
                        initialSection = hashSection;
                    }

                    break;
                }
            }
        }

        // If no section requested or found from the id in the URL hash,
        // but one was requested via the options parameter, load that one
        if (!hashSection && typeof this.options.initialId === "string" && this.options.initialId.length > 0) {
            initialSection = this.sectionWithId(this.options.initialId);
        }

        //TODO do we want to show the initial section right away? seems like
        // we have to but if no delegates are set yet this will be a bit 
        // different than subsequent calls to show
        this.show(initialSection);

		// If there is more than one type of trigger event observe all
		// If there's a better way to do this, let me know
		if (typeof this.triggerEvent === 'object') {
			for (var i=0, evt; evt = this.triggerEvent[i]; i++) {
				Event.observe(document, evt, this._triggerClicked.bindAsEventListener(this));
			}
		} else {
			Event.observe(document, this.triggerEvent, this._triggerClicked.bindAsEventListener(this));
		}
		
		//In IE click event isn't sent when there is no text/image physically under the mouse, but the mouseup is, so we need to listen to that
        // TODO so is this behavior preserved when the event is something other than click?
        if (AC.Detector.isIEStrict()) {
            Event.observe(document, 'mouseup', this._triggerClicked.bindAsEventListener(this));
        }

        //To allow event based section selection
        if (typeof(this.listenForEvent) === 'function') {
            this.selectSectionFromEventHandler = this.selectSectionFromEvent.bind(this);
            this.listenForEvent(AC.ViewMaster, 'ViewMasterSelectSectionWithIdNotification', true, this.selectSectionFromEventHandler);

            if (this.options.parentSectionId) {
                this.listenForEvent(AC.ViewMaster, 'ViewMasterWillCloseNotification', false, function(evt) {
                    var data = evt.event_data.data;

                    if(this === data.sender) {
                        return;
                    }

                    if(data.outgoingView && data.outgoingView.id === this.options.parentSectionId) {
                        this.willClose(this.view,this.currentSection);
                    }
                });
            }
        }
    },

    // ** {{{AC.ViewMaster.initialSectionFromId(initialId)}}} **
    //
    //
    // //TODO I really don't understand why this is a publicly exposed function...//
    initialSectionFromId: function(initialId)
    {
        return this.sectionWithId(initialId);
    },

    // ** {{{AC.ViewMaster.sectionWithId}}} **
    //
    sectionWithId: function(sectionId)
    {
        if(!sectionId) {
            return null;
        }

        var section = null;
        if (sectionId && this.sections.get(sectionId)) {
            section = this.sections.get(sectionId);
        }

        if (section) {
            return section;
        }

        // TODO clean up the following and verify that it actually does what we would expect
        // right now it's commented to document what it does.
        var candidate, result = null;

        // Try to find a candiate for the requested section id
        candidate = document.getElementById(sectionId);

        // if the candidate is our swap view element, ignore it
        if(candidate === this.view._view) {
            candidate = null;
        }


        // if no candidates in the page, find a trigger targetting a remote section by that id
        if (!candidate) {
            candidate = document.body.down('a.'+this.triggerClassName+'[href*=#'+sectionId+']');
        }

        // if no candidate was found by ID within the DOM, assume the
        // specified ID is actually a tag name
        // TODO is that really what we want to look for?
        if(!candidate) {
            result = document.getElementsByName(sectionId);

            if(result && result.length > 0) {
                candidate = result[0];
            }

            if(candidate === this.view._view) {
                candidate = null;
            }
        }

        // Regardless of how we found the candidate...
        if(candidate) {

            // if it's a link it needs to be a trigger for this viewmaster...
            if(candidate.tagName.toLowerCase() === "a") {
                if(Element.hasClassName(candidate, this.triggerClassName)) {
                    section = this.addSection(candidate)
                }
            }
            // or not a link at all.
            else {
                section = this.addSection(candidate);
            }
        }

        return section;
    },

    // ** {{{AC.ViewMaster.indexOfSection(aSection)}}} **
    //
    // Returns the index of the specified section
    indexOfSection: function(aSection)
    {
        return this.orderedSections.indexOf(aSection.id);
    },

    // ** {{{AC.ViewMaster.selectSectionFromEvent(evt)}}} **
    //
    //
    selectSectionFromEvent: function(evt)
    {
        // Ignore events emitted by this viewmaster instance
        if (evt.event_data.data.sender === this) {
            return;
        }
        // Ignore events where the trigger class name does not match this
        // viewmaster instance's own trigger className
        if (evt.event_data.data.parentTriggerClassName !== this.triggerClassName) {
            return;
        }

        //Now that should be something we need to take care of:
        this.selectSectionWithIdEvent(evt.event_data.data.parentSectionId, evt.event_data.data.event);
    },

    // ** {{{AC.ViewMaster.selectSectionWithIdEvent(sectionId, event)}}} **
    //
    // 
    selectSectionWithIdEvent: function(sectionId, event)
    {
        var aSection = this.sectionWithId(sectionId),
            triggers = null,
            i,
            iTrigger,
            triggerFound = false;

        if(aSection) {
            triggers = aSection.triggers();
            if(triggers && triggers.length > 0) {
                for(i=0;(iTrigger = triggers[i]);i++) {
                    if(Element.Methods.hasClassName(iTrigger, this.triggerClassName)) {
                        triggerFound = true;
                        //I just need to simulate 1:
                        break;
                    }
                }
            }

            //Let's create one!
            if(!triggerFound) {
                iTrigger = document.createElement("a");
                iTrigger.className = this.triggerClassName;
                iTrigger.href = "#"+sectionId;
                iTrigger.style.display = "none";
                document.body.appendChild(iTrigger);
                //save this trigger for the 2nd click
                aSection._triggers.push(iTrigger);
            }

            //This should trigger _triggerClicked()
            this.triggerClicked(event, $(iTrigger));

        }
    },

    // ** {{{AC.ViewMaster.setDelegate(delegate)}}} **
    //
    // Sets the delegate of the receiver.
    // 
    // {{{delegate}}}: The object to set as the receiver's delegate.
    setDelegate: function(delegate)
    {
        this.delegate = delegate;

        // If the delegate cares and there is a current section already
        // being shown, inform the delegate immediately so it can handle
        // itself appropriately.
        if (this.delegate && typeof(this.delegate.didShow) === 'function' &&
            this.currentSection && this.currentSection.isContentLoaded())
        {
            this.delegate.didShow(this, this.previousSection, this.currentSection);
        }
    },

    // ** {{{AC.ViewMaster.addSection(contentNode)}}} **
    //
    // Adds a section object wrapping the specified {{{contentNode}}} to 
    // the ViewMaster's collection. The newly created section is returned.
    // 
    // {{{contentNode}}}: The element to wrap with the new {{{Section}}}
    // object.
    addSection: function(contentNode)
    {
        var section = new AC.ViewMaster.Section(contentNode,this);
        //add keyed entry into hash
        this.sections.set(section.id, section);
        //add key into ordered array for prev/next functionality
        this.orderedSections.push(section.id);
        return section;
    },

    // ** {{{AC.ViewMaster.triggerClicked(evt, element)}}} **
    //
    // TODO should this method be public?
    // TODO should this method expose the fact that it usually handles a 'clicked' trigger
    triggerClicked: function(evt, element)
    {
        //set the clicked trigger active as soon as possible to reduce apparent lag
        element.addClassName('active');

        if (evt && this.options.silentTriggers) {
            Event.stop(evt);
        }

        var section = null,
            contentId;

        if (!!element.href.match(/#previous/)) {
            section = this.getPreviousSection();
        } else if (!!element.href.match(/#next/)) {
            section = this.getNextSection();
        } else {
            var matches = element.href.match(this.sectionRegExp);
            if (matches) {
                contentId = matches[1];
            } else {
                contentId = element.name;
            }
            section = this.sections.get(contentId);
        }

        //No section means either a lazy initialization of sections
        //or a section for which the content is remote.
        if (!section) {
            section = this.addSection(element);
        }

        if (section.isContentRemote()) {
            if (section.isContentLoaded()) {
               section.clearTrigger(element);
            }
            if (evt) {
                Event.stop(evt);
            }
        }

        //stop if the trigger is trying to open the current section
        if (section === this.currentSection) {
            if (evt) {
                Event.stop(evt);
            }

            //We don't have to do anything but we still need to post an event saying it's all good:
            //To trigger event based section selection
            //Send notification:
            if (typeof(AC.ViewMaster.dispatchEvent) === 'function') {
                AC.ViewMaster.dispatchEvent('ViewMasterDidShowNotification', {
                    sender: this,
                    outgoingView: this.previousSection,
                    incomingView: this.currentSection,
                    trigger: element});
            }
            return;
        } else if (!section) {
            return;
        }

        this._didShowInitial = true;
        // Give the DOM a moment to update the clicked trigger as active, and then go onto the expensive show method
        setTimeout(this.show.bind(this,section), 1);
    },

    _triggerClicked: function(evt) {

        // If this section is passive, don't act on any event observed
        if (this.options.passive) {
            return;
        }

        // Stop as early as possible if there's no need to continue
        if (this._locked) {
            Event.stop(evt);
            return;
        }

        var trigger = evt.element();

        if(AC.Detector.isIEStrict() && evt.type === "mouseup") {
            if(trigger && trigger.nodeName.toUpperCase() === 'A' ) {
                trigger = trigger.down("."+this.triggerClassName);
            }
        } else {
            while (trigger && trigger.nodeName.toUpperCase() !== 'A' && trigger.nodeName.toUpperCase() !== 'BODY') {
                trigger = trigger.parentNode;
            }
        }

        //ignore if the element is not a trigger
        if (trigger && trigger.href && Element.Methods.hasClassName(trigger, this.triggerClassName)) {
            if(this.options.parentSectionId && (typeof(this.stopListeningForEvent) === 'function') && (typeof(this.listenForEvent) === 'function') && (typeof(AC.ViewMaster.dispatchEvent) === 'function')){
                var self = this;
                //Stop event now: We need to streamline the stoping of events between _triggerClicked and triggerClicked
                Event.stop(evt);

                //Remove observer so we don't listen to ourself:
                 this.stopListeningForEvent(AC.ViewMaster, 'ViewMasterSelectSectionWithIdNotification', true, this.selectSectionFromEventHandler);

                 this.listenForEvent(AC.ViewMaster, 'ViewMasterDidShowNotification', false, function(evt) {
                     //Complete the selection of my section when I, as a section of another viewMaster, am in place.
                     this.stopListeningForEvent(AC.ViewMaster, 'ViewMasterDidShowNotification', false, arguments.callee);
                     self.triggerClicked(evt, trigger);

                     this.listenForEvent(AC.ViewMaster, 'ViewMasterSelectSectionWithIdNotification', true, this.selectSectionFromEventHandler);
                });

                //To trigger event based section selection
                AC.ViewMaster.dispatchEvent('ViewMasterSelectSectionWithIdNotification', {sender: this, parentSectionId: this.options.parentSectionId, parentTriggerClassName:this.options.parentTriggerClassName, event:evt, trigger:trigger});
            } else {
                this.triggerClicked(evt, trigger);
            }
        }
    },

    // ** {{{AC.ViewMaster.isContentLoaded(swapView, content)}}} **
    //
    // Returns whether or not the specified content has loaded.
    //
    // TODO why is the swapView a parameter at all?
    // TODO why is this a public method?
    isContentLoaded: function(swapView, content)
    {
        //content here is a Section instance
        return content.isContentLoaded();
    },

    // ** {{{AC.ViewMaster.loadContent(swapView, content)}}} **
    //
    // Instructs the specified content to load itself.
    //
    // TODO why is the swapView a parameter at all?
    // TODO why is this a public method?
    loadContent: function(swapView, content)
    {
        if (content) {
            content.loadContent();
        }
    },

    _showContentDidLoad: false,

    // ** {{{AC.ViewMaster.contentDidLoad(section, scriptFragment, context)}}} **
    //
    // 
    contentDidLoad: function(section, scriptFragment, context)
    {
        if (scriptFragment && scriptFragment.firstChild) {
            this._showContentDidLoad = true;
        }

        this.view.setLoadedContent(section);
        AC.loadRemoteContent.insertScriptFragment(scriptFragment);

        if (this._showContentDidLoad && this.delegate && typeof(this.delegate.didShow) === 'function') {
            this.delegate.didShow(this, this.previousSection, this.currentSection);
        }
        this._showContentDidLoad = false;
    },

    //  ** {{{AC.ViewMaster.show(section)}}} **
    // 
    // Show a section
    show: function(section, force)
    {

        // causes problems with overlays, where show(null) seems to be crucial,
        // so we are now passing in a force argument:
        // if (this._locked || !section) return;
        if (this._locked || (!section && !force)) {
            return;
        }

        if (!this.options.alwaysShowSection && section === this.currentSection) {
            return;
        }

        this._locked = true;

	    if (this.delegate && typeof(this.delegate.willShowSection) === 'function') {
            var delegateOverride = this.delegate.willShowSection(this, this.previousSection, section);
            if(delegateOverride instanceof AC.ViewMaster.Section) {
                section = delegateOverride;
            }
        }

        this.previousSection = this.currentSection;

        this.currentSection = section;
        this.view.setContent(section);

        if (typeof this.options.ensureInView === "boolean" && this.options.ensureInView) {
            if (this._didShowInitial) {

                var yOffset = section.content.viewportOffset()[1];
                //if the content is above viewport to pretty far down the page bring it into view
                if (yOffset < 0 || yOffset > (document.viewport.getHeight() * .75)) {
                    new Effect.ScrollTo(section.content, {duration: 0.3});
                }
            } else {
                //ensure we're at the top of the page when the page has 
                //'loaded' otherwise a requested anchor is followed and the 
                //page may have started where the element was prior to styling
                $(document.body).scrollTo();
            }
        }
    },

	// ** {{{AC.ViewMaster.showFirst()}}} **
	//
    // Shows the first section in the receiver's ordered collection.
    showFirst: function()
    {
        this.show(this.getFirstSection());
    },

    // ** {{{AC.ViewMaster.getFirstSection()}}} **
    //
    // Returns the first section in the receiver's ordered collection
    getFirstSection: function()
    {
        return this.sections.get(this.orderedSections[0]);
    },

    // ** {{{AC.ViewMaster.showNext()}}} **
    //
    // Shows the receiver's next section.
    showNext: function()
    {
        this.show(this.getNextSection());
    },

    // ** {{{AC.ViewMaster.getNextSection()}}} **
    //
    // Returns the receiver's next section
    getNextSection: function()
    {
        var currentIndex = this.orderedSections.indexOf(this.currentSection.id);
        var nextIndex = (this.orderedSections.length - 1) === currentIndex ? 0 : currentIndex + 1;
        return this.sections.get(this.orderedSections[nextIndex]);
    },

    // ** {{{AC.ViewMaster.showPrevious()}}} **
    //
    // Shows the receiver's previous section.
    showPrevious: function()
    {
        this.show(this.getPreviousSection());
    },

    // ** {{{AC.ViewMaster.getPreviousSection()}}} **
    //
    // Returns the receiver's previous section.
    getPreviousSection: function() {
        var currentIndex = this.orderedSections.indexOf(this.currentSection.id);
        var previousIndex = 0 === currentIndex ? this.orderedSections.length - 1 : currentIndex - 1;
        return this.sections.get(this.orderedSections[previousIndex]);
    },

    // Delegated method from the internal SwapView
    //
    // Responds to the SwapView notifying its delegate that it will show
    // the specified incoming section.
    willShow: function(view, outgoing, incoming)
    {
        //swap view only deals with nodes once we give it the node to show 
        //so we need to keep track of which section was requested if we ever
        //need to know about the incoming section and not the incoming node
        if (this.delegate && typeof(this.delegate.willShow) === 'function') {
            this.delegate.willShow(this, this.previousSection, this.currentSection);
        }

        //Send notification:
        if (typeof(AC.ViewMaster.dispatchEvent) === 'function') {
            AC.ViewMaster.dispatchEvent('ViewMasterWillShowNotification', {sender:this, outgoingView:this.previousSection, incomingView:this.currentSection} );
        }

        this._repaintTriggers(this.previousSection, this.currentSection);

        if (this._didShowInitial && incoming && incoming != this.previousSection) {
            $(incoming.content).setOpacity(0.0);
            $(incoming.content).removeClassName('hidden')
        }

        if(incoming) {
            return incoming.willShow(this);
        }
        return null;
    },

    // Delegated method from the internal SwapView
    //
    // Responds to the SwapView notifying its delegate that it is about to close
    // the specified outgoing section.
    //
    // TODO should the delegate method and notification provide different information?
    willClose: function(view, outgoing)
    {

        if (this.delegate && typeof(this.delegate.willClose) === 'function') {
            this.delegate.willClose(this, this.previousSection, this.currentSection);
        }
        //Send notification:
        if (typeof(AC.ViewMaster.dispatchEvent) === 'function') {
            AC.ViewMaster.dispatchEvent('ViewMasterWillCloseNotification', {sender:this, outgoingView:outgoing} );
        }
        if (this.previousSection) {
            this.previousSection.willClose(this);
        }
    },

    // Whether or not the content should be animated
    shouldAnimateContentChange: function(swapView, swapViewCurrentContent, swapViewNextContent)
    {
        var result = true;
        if (this.delegate && typeof(this.delegate.shouldAnimateContentChange) === 'function') {
            result = this.delegate.shouldAnimateContentChange(this, this.previousSection, this.currentSection);
        } else {
            result = (typeof this.options.shouldAnimateContentChange === "boolean") ? this.options.shouldAnimateContentChange : true;
        }
        // TODO why does this return true for anything that is not a boolean??
        return (typeof result === "boolean") ? result : true;
    },

    willAnimate: function(view, outgoing, incoming, afterFinish)
    {
        var duration = this.options.animationDuration || 0.4;
        var queueScope = Math.random() + 'Queue'; //TODO probalby need a unique id for this component we use for queue names

        //if the user hasn't interacted with this yet, jsut continue on
        if (!this._didShowInitial && typeof(afterFinish) == 'function') {
            afterFinish();
            return;
        }

        if (this.delegate && typeof this.delegate.willAnimate == 'function') {
            return this.delegate.willAnimate(this, outgoing, incoming, afterFinish, queueScope);
        }

        if (outgoing) {
            return new Effect.Parallel([
                new Effect.Opacity(outgoing, {sync: true, from: 1.0, to: 0.0}),
                new Effect.Opacity(incoming, {sync: true, from: 0.0, to: 1.0})], {
                    duration: duration,
                    afterFinish: afterFinish,
                    queue: {scope: queueScope}});
        } else {
            return new Effect.Opacity(incoming, {
                from: 0.0,
                to: 1.0,
                duration: duration,
                afterFinish: afterFinish,
                queue: {scope: queueScope}});
        }
    },

    // Acknowledges content appended in the view, and informs delegate
    // if the delegate is interested
    // TODO not expose publicly
    didAppendContent: function(view, content)
    {
        if (this.delegate && typeof this.delegate.didAppendContent === "function") {
            this.delegate.didAppendContent(this, content);
        }
    },

    // Delegated method from the internal SwapView
    // 
    // Responds to the SwapView notifying its delegate that it did show
    // the specified incoming section.
    didShow: function(view, outgoing, incoming)
    {
        if (this.currentSection) {
            this.currentSection.didShow(this);
        }

        this._didShowInitial = true;
        this._locked = false;

        // want to only alert our delegate that we're done after unlocked
        if (!this._showContentDidLoad && this.delegate && typeof(this.delegate.didShow) == 'function') {
            this.delegate.didShow(this, this.previousSection, this.currentSection);
        }

        //Send notification:
        if (typeof(AC.ViewMaster.dispatchEvent) == 'function') {
            AC.ViewMaster.dispatchEvent('ViewMasterDidShowNotification', {sender:this, outgoingView:this.previousSection, incomingView:this.currentSection} );
        }
    },

    // Resets the class names for all the triggers associtated with both
    // the incoming and outgoing sections so that they are waht they should
    // be given the status of their associated section.
    _repaintTriggers: function(outgoingSection, incomingSection)
    {
        if(outgoingSection) {
            var outgoingTriggers = outgoingSection.triggers();
            for(var i=0, iTrigger;(iTrigger = outgoingTriggers[i]);i++) {
                iTrigger.removeClassName('active');
            }

            outgoingTriggers = outgoingSection.relatedElements();
            for(var i=0, iTrigger;(iTrigger = outgoingTriggers[i]);i++) {
                iTrigger.removeClassName('active');
            }
        }

        if(incomingSection) {
            var incomingTriggers = incomingSection.triggers();
            for(var i=0, iTrigger;(iTrigger = incomingTriggers[i]);i++) {
                iTrigger.addClassName('active');
            }

            incomingTriggers = incomingSection.relatedElements();
            for(var i=0, iTrigger;(iTrigger = incomingTriggers[i]);i++) {
                iTrigger.addClassName('active');
            }
        }
    }
});

if (Event.Publisher) {
    Object.extend(AC.ViewMaster, Event.Publisher);
}

if (Event.Listener) {
    Object.extend(AC.ViewMaster.Viewer.prototype, Event.Listener);
}

//  == AC.ViewMaster.Section ==
// Class that wraps DOM content to swap into and out of a ViewMaster

AC.ViewMaster.Section = Class.create({

	content: null,
	
	moviePanel: null,
	controllerPanel: null,
	movie: null,
	_movieController: null,
	movieLink: null,
	endState: null,
	
	hasShown: false,
	_isContentRemote: false,
	isContentRemote: function() {
		return this._isContentRemote;
	},
	_isContentLoaded: true,
	isContentLoaded: function() {
		return this._isContentLoaded;
	},

	_onMoviePlayable: Prototype.EmptyFunction,
	_onMovieFinished: Prototype.EmptyFunction,
	
	id: null,
	
	triggers: function() {
		if(!this._triggers) {
			this._triggers = [];

			var sectionRegExp = new RegExp('#' + this.id + '$');
			if (this.viewMaster.sectionRegExp || this.viewMaster.options.sectionRegExp) {
				sectionRegExp = this.viewMaster.sectionRegExp || this.viewMaster.options.sectionRegExp;
				sectionRegExp = sectionRegExp.toString().replace(/^\//, '').replace(/\/$/, '');
				sectionRegExp = new RegExp(sectionRegExp.replace('(.*)', this.id));
			}

			var triggers = document.getElementsByClassName(this.viewMaster.triggerClassName);
			for(var i=0, iTrigger;(iTrigger = $(triggers[i]));i++) {
				if(iTrigger.tagName.toLowerCase() !== "a") continue;
				if (iTrigger.href.match(sectionRegExp)) {
					this._triggers.push(iTrigger);
				}
			}
		}
		return this._triggers;
	},
	
	relatedElements: function() {
		if(!this._relatedElements) {
			this._relatedElements = document.getElementsByClassName(this.id);
			//this._dependentElements = [];
			//var triggers = document.getElementsByClassName(this.id);
			//for(var i=0, iTrigger;(iTrigger = $(triggers[i]));i++) {
			//	this._dependentElements.push(iTrigger);
			//}
		}
		return this._relatedElements;
	},

	initialize: function(content, viewMaster) {
		
		this.content = $(content);
		
		//Special casing for remote content / lazy initialization
		if(this.content.tagName.toLowerCase() === "a") {
			var href = this.content.href;
			var parts = href.split("#");
			this._contentURL = parts[0];
			var windowLocationParts = window.location.href.split("#");
			var contentClassName = content.className;
            var baseTag = document.getElementsByTagName("base")[0];
            var baseHref = baseTag ? baseTag.href : null;
			
			if(parts.length === 2) {
				this.id = parts[1];
			}
			
			if(this._contentURL.length > 0 && (!baseHref || this._contentURL != baseHref) && (this._contentURL !== windowLocationParts[0]) && (!this._contentURL.startsWith("#") || this._contentURL !== href)) {				
				//We should assess wether the link is an external html, an image or a movie.
				//For now I'm going to assume an external HTML, but we'll have to revisit that.
				this._isContentRemote = true;
				this._isContentLoaded = false;
			}
			//This is an inner document reference:
			else {
				var loadedContent = $(this.id) || $('MASKED-'+this.id);
				if(loadedContent) this.content = loadedContent;
			}
			
			
			if(!this.id) this.id = this.content.name;

		
		}
		else {
			this.id = content.id;
		}
		//disguise the contentAnchor so trigger links don't jump to it
		//of course trigger links need to know their target is now prefixed 
		//with "MASKED-"
		if(!this._isContentRemote || this._isContentLoaded) {
			this.content.setAttribute('id', 'MASKED-' + this.id);
		}
		
		//set up the viewMaster
		if(viewMaster) this.viewMaster = viewMaster;
		
		//use found node if it has content class
		if (!this._isContentRemote && this._isContentLoaded && !this.content.hasClassName('content')) {
			//otherwise search the node for the first child flagged as content
			var contentChild = this.content.getElementsByClassName('content')[0];
			if(contentChild) this.content = contentChild;
		}
		
		this.isMobile = AC.Detector.isMobile();
	},
	clearTrigger: function(trigger) {
        if(trigger.href === ("#"+this.id)) return;
        
		trigger.href = "#"+this.id;
		
		//Set the content to be the remote one
		//Remove the id/name that was on the link:
		trigger.removeAttribute("id");
		trigger.removeAttribute("name");
    },
	remoteContentDidLoad: function(remoteContentNode,scriptFragment) {
		//update the href to be #id
		this.clearTrigger(this.content);
				
		this.content = $(remoteContentNode);

		//this.content.id = this.id;
		this.content.setAttribute('id', 'MASKED-' + this.id);
		this._isContentLoaded = true;
		this.viewMaster.contentDidLoad(this,scriptFragment);
	},

	loadContent: function() {
		if(this._isContentLoaded) {
			var self = this;
			self.viewMaster.contentDidLoad(self,null);
			//setTimeout(function(){self.viewMaster.contentDidLoad(self);},0);
		}
		else if (this.content.className.indexOf("imageLink") !== -1) {
            		var aDiv = document.createElement('div');
                    aDiv.appendChild(this.content.cloneNode(true));
                    this.remoteContentDidLoad(aDiv);
        }
        else if(this.content.className.indexOf("movieLink") !== -1) {
            		var aDiv = document.createElement('div');
                    aDiv.appendChild(this.content.cloneNode(true));
                    this.remoteContentDidLoad(aDiv);
        }
        else {
			AC.loadRemoteContent(this._contentURL,true,true,this.remoteContentDidLoad.bind(this));
		}
	},
	
	willShow: function() {
		
		if (!this.hasShown) {
			this.hasShown = true;
			var images = this.content.getElementsByClassName('imageLink');
			for (var i = 0; i < images.length; i++) {
				this._loadImage(images[i]);
			}
		
			if (!this.moviePanel) {
				this.movieLink = this.content.getElementsByClassName('movieLink')[0];
				this.posterLink = this.content.getElementsByClassName('posterLink')[0];

				if (this.movieLink) {
					this._loadMovie();
				}
			}
		}
		
		return this.content;
	},
	
	_loadImage: function(imageLink) {
		var image = document.createElement('img');
																 
		 //IE turns an <a> tag's relative URL starting with a / into an about:..., so assuming we'll never use about:/ ...
		if(imageLink.protocol === "about:") {
			 imageLink.href = "/"+imageLink.pathname;
		}
																 
		image.setAttribute('src', imageLink.href);
		image.setAttribute('alt', imageLink.title);
		
		imageLink.parentNode.replaceChild(image, imageLink);
	},
	
	_loadMovie: function() {
		this.moviePanel = $(document.createElement('div'));
		this.moviePanel.addClassName("moviePanel");
		
		this.movieLink.parentNode.replaceChild(this.moviePanel, this.movieLink);
		
		this.controllerPanel = $(document.createElement('div'));
		this.controllerPanel.addClassName('controllerPanel');
		this.moviePanel.parentNode.insertBefore(this.controllerPanel, this.moviePanel.nextSibling);
		
		this.endState = $(this.content.getElementsByClassName('endState')[0]);
		if (this.endState) {
			this.endState.parentNode.removeChild(this.endState);
			
			var replay = $(this.endState.getElementsByClassName('replay')[0])
			if (replay) replay.observe('click', function(evt) {
				Event.stop(evt);
				this.replayMovie();
			}.bindAsEventListener(this))
			
		}
	},
	
	didShow: function(viewer) {
		
		var needsController = this.hasMovie() && !this.isMobile;
		
		if (needsController) {
			this._movieController = new AC.QuicktimeController();
			this.controllerPanel.innerHTML = '';
			this.controllerPanel.appendChild(this._movieController.render());
		}

		this._playMovie();
		
		if (needsController) {
			this._onMoviePlayable = this._movieController.monitorMovie.bind(this._movieController);
			this._onMovieFinished = this.didFinishMovie.bind(this);
			
			this._movieController.attachToMovie(this.movie, {
				onMoviePlayable: this._onMoviePlayable,
				onMovieFinished: this._onMovieFinished});
		}
	},
	
	willClose: function(viewer) {
		this._closeController();
		this._closeMovie();
	},
	
	_closeMovie: function() {
		if (this.movie && this.moviePanel) {
			this.moviePanel.removeChild(this.movie)
			this.movie = null;
			this.moviePanel.innerHTML = '';
		}
	},
	
	_closeController: function(){
		if (this._movieController && this._movieController.movie && this.hasMovie() && !this.isMobile) {
			//TODO this prevents the audio from lingering in safari for the most part, but is probably jsut masking a problem somewhere
			this._movieController.Stop();
			this._movieController.detachFromMovie();

			//set the controller as inactive for styling purposes?
			this.controllerPanel.addClassName('inactive');
			this._movieController.replay = this.replayMovie.bind(this);
			this.controllerPanel.observe('click', this._movieController.replay);
		}
	},
	
	hasMovie: function() {
		return !!this.movieLink;
	},
	
	didFinishMovie: function() {
		if (!this.hasMovie()) {
			return;
		}
		
		this._closeController();
		this._closeMovie();
			
		if (this.endState) {
			this.moviePanel.appendChild(this.endState);
		}
		
		if (typeof(document.event.dispatchEvent) == 'function') {
			document.event.dispatchEvent('didFinishMovie', this);
		}
	},
	
	_playMovie: function() {
		if (this.movieLink && this.moviePanel) {
			
			this.moviePanel.innerHTML = '';
			
			if (this.posterLink && this.posterLink.href) {
				var posterFrame = this.posterLink.href;
			}
			
			var movieParams = this.movieLink.getAttribute('href', 2).toQueryParams();
			
			var width = movieParams.width || 640;
			var height = movieParams.height || 480;
			var color = movieParams.bgcolor || 'white';
			
			//need some unique id for these guys
			this.movie = AC.Quicktime.packageMovie(this.movieLink.id + "movieId", this.movieLink.getAttribute('href', 2), {
				width: width,
				height: height,
				controller: false,
				posterFrame: posterFrame,
				showlogo: false,
				autostart: true,
				cache: true,
				bgcolor: color,
				aggressiveCleanup: false});
			
			this.moviePanel.appendChild(this.movie);
			 if (typeof(document.event.dispatchEvent) == 'function') {
				 document.event.dispatchEvent('didStart', this);
		}
		 }
	},
	
	replayMovie: function() {
		if (typeof(document.event.dispatchEvent) == 'function') {
			document.event.dispatchEvent('replayMovie', this);
		}

		this._playMovie();

		this.controllerPanel.removeClassName('inactive');
		this.controllerPanel.stopObserving('click', this._movieController.replay);
		this._movieController.replay = null;

		this._movieController.attachToMovie(this.movie, {
			onMoviePlayable: this._onMoviePlayable,
			onMovieFinished: this._onMovieFinished});
	}
	
});


AC.ViewMaster.SlideshowViewer = Class.create();
Object.extend(AC.ViewMaster.SlideshowViewer.prototype, AC.ViewMaster.Viewer.prototype);
Object.extend(AC.ViewMaster.SlideshowViewer.prototype, {

    _superInitialize: AC.ViewMaster.Viewer.prototype.initialize,

    initialize: function(contents, view, triggerClassName, slideShowTriggerClassName, options) {
        this._superInitialize(contents, view, triggerClassName, options);

        this.slideshow = new AC.ViewMaster.Slideshow(this, slideShowTriggerClassName, options);
    },

	setDelegate: function(delegate) {
		this.delegate = delegate;	
	},
	
    start: function() {
        this.slideshow.start();
    },

    stop: function() {
        this.slideshow.stop();
    },

    // Show the first frame in the slideshow and reset progress to zero
    // At the moment this does not pause the slideshow
    reset: function() {
        if(this._isLocked) {
            this._needsReset = true;
        }
        else {
        this.slideshow.reset();
        }
    },

    superDidShow: AC.ViewMaster.Viewer.prototype.didShow,
	didShow: function(view, outgoing, incoming) {

		this.superDidShow(view, outgoing, incoming);
        if(this._needsReset) {
            this._needsReset = false;
            this.slideshow.reset();
        }
	},	

    // Show the next slide in the slideshow
    next: function() {
        this.slideshow.next();
    },

    // Show the previous slide in the slideshow
    previous: function() {
        this.slideshow.previous();
    }

});


// TODO extract this from this code, eventually should build this on top of
// our animation framework as it approaches a more generic animation timer
AC.ViewMaster.Slideshow = Class.create();
if (Event.Listener) Object.extend(AC.ViewMaster.Slideshow.prototype, Event.Listener);
if (Event.Publisher) Object.extend(AC.ViewMaster.Slideshow.prototype, Event.Publisher);

Object.extend(AC.ViewMaster.Slideshow.prototype, {

    contentController: null,
	animationTimeout: null,
	options: null,

	_playing: false,
	_active: false,
	
	_progress: 0,
    setProgress: function(value) {
        this._progress = value;
    },
    progress: function() {
        return this._progress;
    },

    initialize: function(contentController, triggerClassName, options) {
		
        this.contentController = contentController;

		this.triggerClassName = triggerClassName;
		
		this.options = options || {};
		
        // If the addNoListeners is set to true, then it is up to the person
        // instantiating the slideshowto attach listeners
        // otherwise the slideshow assumes you're using a viewmaster so it 
        // listens for notifications
        if (!options.addNoListeners) {
            this.listenForEvent(AC.ViewMaster, 'ViewMasterWillShowNotification',
                true, this.willShow);

            this.listenForEvent(AC.ViewMaster, 'ViewMasterDidShowNotification',
                true, this.didShow);
        }

        if (this.options.autoplay) {
		this.start();
        }
		
        if (this.triggerClassName) {
		Event.observe(document, 'click', this._triggerHandler.bindAsEventListener(this));
        }
	},
	
    // Start the slideshow if the slideshow is not already active
    // Progress is reset to zero if the wipeProgress option is set to "always" or "on start"
	start: function() {
		if (this._active) {
			return;
		}
		
		this._active = true;
		if (this.options.wipeProgress == "always" || this.options.wipeProgress == "on start") {
			this._progress = 0;
		}
		this.play(true);
		this._repaintTriggers();
		  if (typeof(document.event.dispatchEvent) == 'function') {
			  document.event.dispatchEvent('didStart', this);
		  }
	},
	
    // Stop the slideshow if the slideshow is active
	stop: function() {
		if (!this._active) {
			return
		}
		
		this._active = false;
		this.pause();
		this._repaintTriggers();
		  if (typeof(document.event.dispatchEvent) == 'function') {
			  document.event.dispatchEvent('didEnd', this);
		  }
	},
	
    // Starts playing the slideshow if the slideshow is not already active
    // Progress is reset to zero if the wipeProgress option is set to "always" or "on play"
	play: function(wasStart) {
		if (!this._active) {
			return;
		}
		
		if (this.options.wipeProgress == "always" || (this.options.wipeProgress == "on play" && !wasStart)) {
			this._progress = 0;
		}
		
		this.animationTimeout = setTimeout(this._update.bind(this), this._heartbeatDelay());
		this._playing = true;
	},
	
    // Handles progress made within the slideshow
	_update: function() {
		
		if (typeof(this.options.onProgress) == 'function') {
			this.options.onProgress(this._progress, this.delay());
		}
		
		if (this._progress >= this.delay()) {
			this._progress = 0;
			this.next();
		} else {
			this._progress += this._heartbeatDelay();
			this.animationTimeout = setTimeout(this._update.bind(this), this._heartbeatDelay());
		}
	},
	
    // The between slides in milliseconds
	delay: function() {
 		return this.options.delay || 5000;
	},
	
    // The delay between progress made which does not trigger a slide
    // transition in milliseconds
	_heartbeatDelay: function() {
		return this.options.heartbeatDelay || 100;
	},
	
    // Pause the slideshow
	pause: function() {
		clearTimeout(this.animationTimeout);
		this._playing = false;
	},
	
    // Have the contentController show the next slide
	next: function() {
        if (this.options.willEnd && (this.contentController.getNextSection() == this.contentController.getFirstSection())) {
            if (typeof(document.event.dispatchEvent) == 'function') {
                document.event.dispatchEvent('didEnd', this);
            }
            return;
        }
        this.contentController.showNext();
	},
	
    // Have the contentController show the previous slide
	previous: function() {
        this.contentController.showPrevious();
	},
	
    reset: function() {
        this.contentController.showFirst();
        this.setProgress(0);
    },

    // Acknowledge that the contentController will show a slide
    willShow: function(evt) {
        // ignore if event was not sent from our contentController
        if (evt.event_data.data.sender != this.contentController) {
            return;
        }
		this.pause();
	},
	
    // Acknowledge that the contentController did show a slide
    didShow: function(evt) {
        // ignore if event was not sent from our contentController
        if (evt.event_data.data.sender != this.contentController) {
            return;
        }

		this.play();
	},
	
    // Handle mousedown events in the document to check for explicit
    // play/pause control events
	_triggerHandler: function(evt) {
		var element = evt.element();
		var section = null;
		
		//ignore if the element is not a trigger
		if (element.hasClassName(this.triggerClassName) && element.href.match(/#slideshow-toggle/)) {
			Event.stop(evt);
			
			if (this._active) {
				this.stop();
			} else {
				this.start();
			}
		}
	},
	
    // Repaints the triggers associated with controlling this slideshow
	_repaintTriggers: function() {
        if(!this.triggerClassName) return;
		var triggers = document.getElementsByClassName(this.triggerClassName);
		for (var i = triggers.length - 1; i >= 0; i--){
			this._repaintTrigger(triggers[i])
		}
	},

    // Repaint an individual trigger associated with this slideshow
	_repaintTrigger: function(trigger) {
		var trig = $(trigger);
		if (this._active) {
			trig.addClassName('playing');
		} else {
			trig.removeClassName('playing');
		}
	}
	
});


AC.loadRemoteContent = function(contentURL,importScripts,importCSS,callback,context,delegate) {
	if(typeof contentURL !== "string") return;
	if(typeof importScripts !== "boolean") importScripts = true;
	if(typeof importCSS !== "boolean") importCSS = true;
	var callee = arguments.callee;
	var registeredArguments = callee._loadArgumentsByUrl[contentURL];
	if(!registeredArguments) {
		callee._loadArgumentsByUrl[contentURL] = {
			contentURL:contentURL,
			importScripts:importScripts,
			importCSS:importCSS,
			callback:callback,
			context:context,
			delegate:delegate
			};
		
		new Ajax.Request(contentURL, {
		  method:'get',
		  requestHeaders: {Accept: 'text/xml'},
		  onSuccess: arguments.callee.loadTemplateHTMLFromRequest,
		  onFailure: arguments.callee.failedToadTemplateHTMLFromRequest,
		  onException: function(r,e) { throw(e); }, // FIXME remove me
		  onCreate: function(response) {
			response.request.overrideMimeType('text/xml');
		  }
		  
		});
		
	}
}

AC.loadRemoteContent._loadArgumentsByUrl = {};

AC.loadRemoteContent.loadTemplateHTMLFromRequest = function(httpResponse) {
	var reqURL = httpResponse.request.url;
	var callee = arguments.callee;
	var registeredArguments = AC.loadRemoteContent._loadArgumentsByUrl[reqURL];

	var windowDocument = window.document;
	var xmlDocument = httpResponse.responseXMLValue().documentElement;

	if(AC.Detector.isIEStrict()) {
		xmlDocument = xmlDocument.ownerDocument;
	}

	var windowDocument = window.document;
	var scriptFragment = document.createDocumentFragment();

	if(registeredArguments.importScripts) {
		AC.loadRemoteContent.importScriptsFromXMLDocument(xmlDocument,scriptFragment,registeredArguments);
	}
	if(registeredArguments.importCSS) {
		AC.loadRemoteContent.importCssFromXMLDocumentAtLocation(xmlDocument,reqURL,registeredArguments);
	}

	//var result = xmlDocument.getElementsByTagName("body")[0].clonedInnerDocumentFragment();
	//Apparently, importing a document fragment doesn't cut it. However, importing nodes and adding them to a document fragment does!
	var result = null;
	var rootElement = null;
	var body = xmlDocument.getElementsByTagName("body")[0];
	
	if(!body) {
		return;
	}
	
	body.normalize();
	var rootElement = Element.Methods.childNodeWithNodeTypeAtIndex(body, Node.ELEMENT_NODE,0);
	
    var isSafari2 = AC.Detector.isSafari2();
	if(rootElement) {
        if(isSafari2) {
            result = windowDocument._importNode(rootElement, true);
        }
        else {
            result = windowDocument.importNode(rootElement, true);
        }
		//We can live without that for now
		if(result.cleanSpaces) result.cleanSpaces(true);
	}
	else {
		if(body.cleanSpaces) body.cleanSpaces(true);
		else if(typeof body.normalize === "function") body.normalize();

		var bodyChildNodes = body.childNodes;
		result = windowDocument.createDocumentFragment();
		var notSpace = /\S/;
		for(var i=0,iBodyChildNode=0;(iBodyChildNode = bodyChildNodes[i]);i++) {
			var importedNode = (isSafari2) ? windowDocument._importNode(iBodyChildNode, true) : windowDocument.importNode(iBodyChildNode, true);
			result.appendChild(importedNode);
		}
	}
	
	//invoke the callback with result:
	var callback = registeredArguments.callback;
	callback(result,scriptFragment,registeredArguments.context);

}
AC.loadRemoteContent.javascriptTypeValueRegExp = new RegExp("text/javascript","i");
AC.loadRemoteContent.javascriptLanguageValueRegExp = new RegExp("javascript","i");

AC.loadRemoteContent.documentScriptsBySrc = function() {
	if(!AC.loadRemoteContent._documentScriptsBySrc) {
		AC.loadRemoteContent._documentScriptsBySrc = {};
		var scripts = document.getElementsByTagName('script');
		if(!scripts || scripts.length === 0) {
			return AC.loadRemoteContent._documentScriptsBySrc;
		}
		
		for(var i=0,iScript=null;(iScript = scripts[i]);i++) {
			var type = iScript.getAttribute("type");
			var src = null;

			var language = iScript.getAttribute("language");
			if(!this.javascriptTypeValueRegExp.test(type) && !this.javascriptLanguageValueRegExp.test(language)) continue;

			if(iScript.hasAttribute) {
				var iScriptHasSrc = iScript.hasAttribute("src");
			}
			else {
				var iScriptHasSrc = Element.Methods.hasAttribute(iScript,"src");
			}

			if(iScriptHasSrc) {
				var src = iScript.getAttribute("src");
				AC.loadRemoteContent._documentScriptsBySrc[src] = src;
			}

		}
	}
	return AC.loadRemoteContent._documentScriptsBySrc;
}

AC.loadRemoteContent.importScriptsFromXMLDocument = function(xmlDocument,frag,registeredArguments) {
		var scripts = xmlDocument.getElementsByTagName('script'),
			type,
			src,
			language,
			iScriptHasSrc,
            contentURL = registeredArguments.contentURL,
            delegate = registeredArguments.delegate,
            context = registeredArguments.context,
            hasShouldImportScript = (delegate && typeof delegate.shouldImportScript === "function"),
            shouldImportScript = true;
		if(!frag) frag = document.createDocumentFragment();
		var documentScriptsBySrc = AC.loadRemoteContent.documentScriptsBySrc();
		for(var i=0,iScript=null;(iScript = scripts[i]);i++) {
			type = iScript.getAttribute("type");
			src = null;
            shouldImportScript = true;
            

			language = iScript.getAttribute("language");
			if(!this.javascriptTypeValueRegExp.test(type) && !this.javascriptLanguageValueRegExp.test(language)) continue;

			if(iScript.hasAttribute) {
				iScriptHasSrc = iScript.hasAttribute("src");
				src = iScript.getAttribute("src");
			}
			else {
				src = iScript.getAttribute("src");
				iScriptHasSrc = ((src != null) && (src !== ""));
			}

			//var localScript = window.document.importNode(iScript, true);
			//frag.appendChild(localScript);
            if(iScript.getAttribute("id") === "Redirect" ||  (hasShouldImportScript && !delegate.shouldImportScriptForContentURL(iScript,contentURL,context))) {
                    continue
            }
            
			if(iScriptHasSrc) {
				if( !documentScriptsBySrc.hasOwnProperty(src)) {
				
					//var localScript = window.document.importNode(iScript, true);
					var localScript = document.createElement('script');
					localScript.setAttribute("type","text/javascript");
					localScript.src = src;
					AC.loadRemoteContent._documentScriptsBySrc[src] = src;
					frag.appendChild(localScript);
				}
			}
			//Inline string
			else {
				
				var localScript = document.createElement('script');
				localScript.setAttribute("type","text/javascript");
				if(AC.Detector.isIEStrict()) {
					//This twisted construction is to work around a bug where IE immediately execute
					//a script whith it's text property initialized, so an "inline" script, when appended to
					//a document fragment.
					var contentFunction = new Function(iScript.text);
					localScript.onreadystatechange = function() {
							var target = window.event.srcElement;
							if ( !target.isLoaded && ((target.readyState == 'complete') || (target.readyState == 'loaded'))) {
								target.onreadystatechange = null;
								target.isLoaded = true;
								contentFunction();
				}
			}
				}
				else {
                   var ua = navigator.userAgent.toLowerCase(); 
                   var isAppleWebKit = (ua.indexOf('applewebkit') != -1);
                   var version = parseInt(parseFloat( ua.substring( ua.lastIndexOf('safari/') + 7 ) ));
                   var isSafari2x = (isAppleWebKit && version >= 419);

                    if(isSafari2x) {
                        localScript.innerHTML = iScript.innerHTML;
                    }
                    else {
                        localScript.text = iScript.text;
                    }
				}
				AC.loadRemoteContent._documentScriptsBySrc[src] = src;
				frag.appendChild(localScript);

		}

		}
		return frag;
};

AC.loadRemoteContent.insertScriptFragment = function(scriptFragment) {
	if(!scriptFragment) return;
	var head = document.getElementsByTagName("head")[0];
	head.appendChild(scriptFragment);
	head=null;
}

AC.loadRemoteContent.documentLinksByHref = function() {
	if(!AC.loadRemoteContent._documentLinksByHref) {
		AC.loadRemoteContent._documentLinksByHref = {};
		var links = document.getElementsByTagName('link');
		if(!links || links.length === 0) {
			return AC.loadRemoteContent._documentLinksByHref;
		}
		
		for(var i=0,iLink=null;(iLink = links[i]);i++) {
			var type = iLink.getAttribute("type");
			if(iLink.type.toLowerCase() !== "text/css") {
				continue;
			}
			var src = null;

			if(iLink.hasAttribute) {
				var iLinkHasSrc = iLink.hasAttribute("href");
			}
			else {
				var iLinkHasSrc = Element.hasAttribute(iLink,"href");
			}

			if(iLinkHasSrc) {
				var src = iLink.getAttribute("href");
				AC.loadRemoteContent._documentLinksByHref[src] = src;
			}

		}
	}
	return AC.loadRemoteContent._documentLinksByHref;
}

AC.loadRemoteContent.__importCssElementInHeadFromLocation = function(iNode,head,url) {
    //I'm going to prepend the component's url
	var isLink = (iNode.tagName.toUpperCase() === "LINK");
    if(isLink) {
		var type = iNode.getAttribute("type");
		if(!type || type && type.toLowerCase() !== "text/css") {
			return;
		}
        var href = iNode.getAttribute("href");
        if(!href.startsWith("http") && !href.startsWith("/")) {
            var hrefOriginal = href;
			if(url.pathExtension().length > 0) {
				url = url.stringByDeletingLastPathComponent();
			}
            href = url.stringByAppendingPathComponent(hrefOriginal);
        }
		if(AC.Detector.isIEStrict()) {
			var stylesheet = window.document.createStyleSheet(href,1);
		}
		else 
		{
			var importedNode = window.document.importNode(iNode, true);
            importedNode.href = href;
		}
		AC.loadRemoteContent.documentLinksByHref()[href] = href;
    }
	if(!AC.Detector.isIEStrict() || (AC.Detector.isIEStrict() && !isLink)) {
		head.insertBefore(importedNode,head.firstChild);
	}
};

AC.loadRemoteContent.importCssFromXMLDocumentAtLocation = function(xmlDocument,url,registeredArguments) {
	//CSS can be linked using either a <style> tag or a <link> tag. I'm going to import them, and only looking at the head child nodes.
	var head = window.document.getElementsByTagName("head")[0];	
	var candidateNodes = [];
	candidateNodes.addObjectsFromArray(xmlDocument.getElementsByTagName("style"));
	candidateNodes.addObjectsFromArray(xmlDocument.getElementsByTagName("link"));
	if(candidateNodes) {
		var documentLinksByHref = AC.loadRemoteContent.documentLinksByHref();
		for(var i=0,iNode=null;(iNode = candidateNodes[i]);i++) {
			var href = iNode.getAttribute("href");
			if(documentLinksByHref.hasOwnProperty(href)) {
				continue;
			}
			this.__importCssElementInHeadFromLocation(iNode,head,url);
		}
	}

};

Ajax.Request.prototype._overrideMimeType = null;
Ajax.Request.prototype.overrideMimeType = function(overrideMimeTypeValue) {
	this._overrideMimeType = overrideMimeTypeValue;
	if (this.transport.overrideMimeType) {
		this.transport.overrideMimeType(overrideMimeTypeValue);
	}
};

Ajax.Request.prototype._doesOverrideXMLMimeType = function() {
	return (this._overrideMimeType === "text/xml");
};

Ajax.Response.prototype.responseXMLValue = function() {
	if(AC.Detector.isIEStrict()) {
		var xmlDocument = this.transport.responseXML.documentElement;
		if(!xmlDocument && this.request._doesOverrideXMLMimeType()) {
			this.transport.responseXML.loadXML(this.transport.responseText);
		}
	}
	return this.transport.responseXML;
};
AC.OverlayPanel = Class.create();
Object.extend(AC.OverlayPanel.prototype, AC.ViewMaster.Viewer.prototype);
Object.extend(AC.OverlayPanel.prototype, Event.Listener);
Object.extend(AC.OverlayPanel.prototype, Event.Publisher);
Object.extend(AC.OverlayPanel.prototype, {
	
	closeBtn: null,
	overlay: null,
	overlayShadow: null,

	overlayId: '',
	overlayClasses: '',
	overlayContents: '',
	overlayShadowId: '',
	overlayShadowClasses: '',
	_overlayShadowSrc: null,
	_defaultOverlayShadowSrc: 'http://images.apple.com/global/elements/overlay/overlay_panel_default.png',
	
	order: 0,
	setOverlayShadowImageSrc: function(value) {
		this._overlayShadowSrc = (value) ? value : this._defaultOverlayShadowSrc;
		this.overlayshadowImage.src = this._overlayShadowSrc;
		if(this.isIE7()) {
		  this.overlayshadowImage.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + this._overlayShadowSrc + "',sizingMethod='scale')";
			this.overlayshadowImage.src = "http://images.apple.com/global/elements/blank.gif";
		}
	},
	overlayShadowImageSrc: function() {
		return (this._overlayShadowSrc) ? this._overlayShadowSrc : this._defaultOverlayShadowSrc;
	},
	initialize: function(contents, view, triggerClassName, options) {
		
		this.overlayId = "OverlayPanel";
		this.overlayShadowId = "OverlayPanelShadow";
		this.createOverlay();
		//this.setDefaults();
		
		triggerClassName = triggerClassName || "OverlayPanel";
		AC.ViewMaster.Viewer.prototype.initialize.call(this,null,this.swapViewElement,triggerClassName,options);
		this.options.shouldAnimateContentChange = false;
	},
	
	createOverlay: function() {
		//this.closeBtn = Builder.node('a', {href:'#close', 'class':'close'}, 'Close');
		this.closeBtnContainer = document.createElement("div");
		this.closeBtnContainer.className = 'closeButtonContainer';
		this.closeBtn = document.createElement("a");
		this.closeBtn.href = '#close';
		this.closeBtn.className = 'close';
		this.closeBtn.appendChild(document.createTextNode("Close"));
		this.closeBtnContainer.appendChild(this.closeBtn);
		
		Event.observe(this.closeBtn, 'click', this.close.bindAsEventListener(this), false);	
		this.swapViewElement = Builder.node('div', {'class':'overlayPanelContent'});
		//this.buildContents();

		this.overlayshadowImage = Builder.node('img', {src:this.overlayShadowImageSrc(), alt:'', border:0, 'class':'overlayPanelShadowImage'});
		if(this.isIE7()) {
		  this.overlayshadowImage.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + this.overlayShadowImageSrc() + "',sizingMethod='scale')";
			this.overlayshadowImage.src = "http://images.apple.com/global/elements/blank.gif";
		}
		this.overlayshadow = Builder.node('div', {id:this.overlayShadowId, 'class':'overlaypanelshadow '+this.overlayShadowClasses}, [this.overlayshadowImage,this.swapViewElement]);
		this.overlay = $(Builder.node('div', {'id':this.overlayId, 'class':'overlaypanel '+this.overlayClasses, 'style':'left:-99999px; top:0;'}, [this.closeBtnContainer,this.overlayshadowImage,this.swapViewElement]));	
 		
		//document.body.appendChild(this.overlayshadow);
 		//document.body.appendChild(this.overlay);
	},
	
	//buildContents: function() {},
	isIE7: function() {
		return (AC.Detector.isIEStrict() && navigator.appVersion.indexOf("MSIE 6.0")>=0);
	},
	
 	setDefaults: function() {
		this.defaultWidth = this.overlay.offsetWidth;
		this.padleft = parseInt(Element.getStyle(this.overlay, 'marginLeft').replace(/px/i,''));
		this.padright = parseInt(Element.getStyle(this.overlay, 'marginRight').replace(/px/i,''));

		this.defaultHeight = this.overlay.offsetHeight;
		this.padtop = parseInt(Element.getStyle(this.overlay, 'marginTop').replace(/px/,''));
		this.padbottom = parseInt(Element.getStyle(this.overlay, 'marginBottom').replace(/px/,''));
 	},

 	setItemAttributes: function() {},

	
 	registerOverlay: function() {
		Event.observe(document, 'click', this.onClick.bindAsEventListener(this), false);
	},
	
	//From the swap view's stand point I'm going to treat the content as not loaded until the animation is over.
	isContentLoaded: function(swapView, content) {
		return false;
	},
	superContentDidLoad: AC.ViewMaster.Viewer.prototype.contentDidLoad,
	contentDidLoad: function(section, scriptFragment) {
        //Insert the overlay element. We need to do that before calling superContentDidLoad to make sure that dynamically loaded content creatinfg widgets can find their stuff
        document.body.appendChild(this.overlay);

    
		this.superContentDidLoad(section, scriptFragment);
		section.content.show();
		section.content.style.visibility = "hidden";
 		section.content.removeClassName("overlaydescription");
		
		//Add to the overlay as class name the section's id:
		this.overlay.addClassName(section.id);
		//this.overlayshadow.addClassName(section.id);
		
        
		//Capture this immediately
		this.setOriginFromEvent(this.currentSectionEvent)
		this.setDefaults();
        
		var self = this;
        //Gives some breathing room to the DOM/CSS to get it's acts together.
        this._isDisplaying = true;
		setTimeout(function(){self._display(section)},100);
	},
	_isDisplaying: false,
	_display: function(section) {
		this.setDefaults();
		this.setDimensions(this.currentSectionEvent, section.content);
		var self = this;
		return this.pop(this.defaultWidth, this.popPosition().top, this.defaultHeight, this.popPosition().left);
		
	},
	
	superWillShow: AC.ViewMaster.Viewer.prototype.willShow,
	willShow: function(view, outgoing, incoming) {
		return this.superWillShow(view, outgoing, incoming);
	},	
	
	superTriggerClicked: AC.ViewMaster.Viewer.prototype.triggerClicked,
	triggerClicked: function(evt,element) {
 		// stop the default event
 		if(evt) Event.stop(evt);

		this.superTriggerClicked(evt,element);
        if(this._isDisplaying) return;
        
		//Reset shadow image
		this.setOverlayShadowImageSrc(null);
		
		this._popPosition = null;
		this.currentSectionEvent = evt;
	
		
		
	},
	
	superShouldAnimateContentChange: AC.ViewMaster.Viewer.prototype.shouldAnimateContentChange,
	shouldAnimateContentChange: function(swapView, swapViewCurrentContent, swapViewNextContent) {
		if(AC.Detector.isiPhone()) return false;
		return this.superShouldAnimateContentChange(swapView, swapViewCurrentContent, swapViewNextContent);
	},
	
	willAnimate: function(view, outgoing, incoming, afterFinish) {
		//this.beforePop();
	},
	
	setOriginFromEvent: function(evt) {
		if(!evt) return;
		this.left = evt.pageX || evt.clientX + (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
		this.top = evt.pageY || evt.clientY + (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);
	},

	setDimensions: function(evt, item) {
 		// store the small size and position for later
 		this._width = (item.offsetWidth>80) ? 80 : item.offsetWidth;
		this.defaultWidth =  item.offsetWidth;
		var position = null;
		if(evt) position = Element.cumulativeOffset(evt.element());
		if(position) this.left = position.left;
		this.left = this.left || document.body.getDimensions().width / 2;
		this.defaultHeight = item.offsetHeight;
		this._height = Math.round((this._width*this.defaultHeight) / this.defaultWidth);
		if(position) this.top = position.top;
		this.top = this.top || document.body.getDimensions().height / 2;

		this.padleft = parseInt(Element.getStyle(item, 'marginLeft').replace(/px/i,''));
		this.padright = parseInt(Element.getStyle(item, 'marginRight').replace(/px/i,''));
		this.padtop = parseInt(Element.getStyle(item, 'marginTop').replace(/px/,''));
		this.padbottom = parseInt(Element.getStyle(item, 'marginBottom').replace(/px/,''));
	},
	
	windowSize: function() {
		var width = document.clientWidth || (document.documentElement.clientWidth || document.body.clientWidth);
		var height = document.clientHeight || (document.documentElement.clientHeight || document.body.clientHeight);
		var x = window.pageXOffset || (window.document.documentElement.scrollLeft || window.document.body.scrollLeft);
		var y = window.pageYOffset || (window.document.documentElement.scrollTop || window.document.body.scrollTop);
		
		if(AC.Detector.isiPhone()) {
			width = parseInt(980);
			height = parseInt(1212);
		}

		return {'width':width, 'height':height, 'x':x, 'y':y}
	},

 	popPosition: function() {
		if(!this._popPosition) {
			// set the position/offset of the image
			var left, top = null;
			var windowSize = this.windowSize();
			left = windowSize.x+(windowSize.width-this.defaultWidth-this.padleft-this.padright)/2;
			if (windowSize.width<this.defaultWidth+this.padleft+this.padright) left = windowSize.x-(this.padtop-this.closeBtnContainer.offsetWidth);

			top = (windowSize.y+(windowSize.height-this.defaultHeight-this.padtop-this.padbottom)/2);
			if (windowSize.height<this.defaultHeight+this.padtop+this.padbottom) {
				top = windowSize.y-(this.padtop-this.closeBtnContainer.offsetHeight);
			}
			if(top < 0 || top < 20) {
				top = 20;
			}
		
			this._popPosition = { left:left, top:top };
		}
		return this._popPosition;
 	},

	setWidth: function(value) {
		this.defaultWidth = value;
		this.overlay.style.width = value+"px";
	},
	width: function() {
		return this.defaultWidth;
	},
	setHeight: function(value) {
		this.defaultHeight = value;
		this.overlay.style.height = value+"px";
	},
	height: function() {
		return this.defaultHeight;
	},

 	prepPop: function() {},

 	beforePop: function() {
		Element.addClassName(this.overlay, 'isanim');
		Element.addClassName(this.overlayshadow, 'isanim');
		Element.addClassName(this.overlay, 'popped');
		Element.addClassName(this.overlayshadow, 'popped');
		if(AC.Detector.isIEStrict()) {
			//this.overlay.runtimeStyle.overflow = "hidden";
		}
 	},

 	pop: function(width, top, height, left, afterFinish) {
		Element.setOpacity(this.overlay, 0);
		Element.setOpacity(this.overlayshadow, 0);

		//We set this._width at 80px;
		this._height = this._width*height/width;

		// prep the overlay/shadow for the effect
		this.overlay.style.width = this._width+'px';
		//this.overlayshadow.style.width = this._width+'px';

		this.overlay.style.height = this._height+'px';
		//this.overlayshadow.style.height = this._height+'px';

		this.overlay.style.left = this.left-this.padleft+'px';
		//this.overlayshadow.style.left = this.left+'px';

		this.overlay.style.top = this.top-this.padtop+'px';
		//this.overlayshadow.style.top = this.top+'px';
		
		this.overlay.style.display = '';


		var percent = (100*width) / this._width;
		// do the craziness
		 new Effect.Parallel([
					new Effect.MoveBy(this.overlay, top-this.top+this.padtop, left-this.left+this.padleft, { sync:true }), 
					new Effect.Scale(this.overlay, percent,{ sync:true, scaleContent:false}),
					new Effect.Appear(this.overlay, { sync:true })
				],
				{ duration:0.3, beforeStart:this.beforePop.bind(this), afterFinish: this.afterPop.bind(this) }
			);
	},

	afterPop: function(item, i) {
		this.closeBtnContainer.style.display = "block";
		this.currentSection.content.style.visibility = "visible";
		this.setPoppedClass();

		// TODO IE breaks on the following, but the calculations for the scale
		// are off, so we'll need to figure something else out
		// this.resetOverlay();
	},

	superWillClose: AC.ViewMaster.Viewer.prototype.willClose,
 	willClose: function() {
 		//this.setIsanimClass();
 		
 		//dispatch beforeClose event in case anything else needs to be closed
 		this.dispatchEvent('beforeClose', this);
		this.superWillClose(this, this.currentSection);
		
		// we need to close the section, otherwise it appears to misalign
		if (this.currentSection) this.currentSection.willClose();
 	},

	resetOverlay: function() {
		// reset the effect inline styles
		this.overlay.style.width = '';
		this.overlay.style.height = '';

		this.overlay.setOpacity('');
	},

	setPoppedClass: function() {
		Element.removeClassName(this.overlay, 'isanim');
		Element.removeClassName(this.overlayshadow, 'isanim');
		Element.addClassName(this.overlay, 'popped');
		Element.addClassName(this.overlayshadow, 'popped');	
	},
	
	setIsanimClass: function() {
		Element.addClassName(this.overlay, 'isanim');
		Element.addClassName(this.overlayshadow, 'isanim');
 		Element.removeClassName(this.overlay, 'popped');
 		Element.removeClassName(this.overlayshadow, 'popped');
	},
	
 	close: function(evt) {
 		if (evt) Event.stop(evt);

		var width = this.defaultWidth;
		var left = this.overlay.offsetLeft;
		var height = this.defaultHeight;
		var top = this.overlay.offsetTop;

		if (left>=0 && top>=0) { // if we are actually showing at the point of closure

            this.willClose(this);

            // Delay the actual effect that closes the overlay so there is 
            // some time for beforeClose notifications to be handled
            setTimeout(this._closeOpenOverlay.bind(this, width, left, height, top), 10);
		}
	},

    _closeOpenOverlay: function(width, left, height, top)
    {
        if (!AC.Detector.isiPhone()) {
            var percent = (100*this._width) / width;

            // do the craziness
            new Effect.Parallel([
                new Effect.MoveBy(this.overlay, this.top-this.padtop-top, this.left-this.padleft-left, { sync:true }), 
                new Effect.Scale(this.overlay, percent, { sync:true, scaleContent:false}),
                new Effect.Fade(this.overlay, { sync:true })
            ],
            { duration:0.3, afterFinish:this.afterClose.bind(this) });
        } else {
            this.afterClose();
        }
    },

 	afterClose: function() {
		//this.currentSection.content.style.visibility = "hidden";
		Element.removeClassName(this.overlay, 'isanim');
		Element.removeClassName(this.overlayshadow, 'isanim');
 		Element.removeClassName(this.overlay, 'popped');
 		Element.removeClassName(this.overlayshadow, 'popped');
		
		// causes problems for notifications:
		// setTimeout(function() {
		// 	this.view.setContent(null);
		// }.bind(this), 10);
		
		this.overlay.removeClassName(this.currentSection.id);
		//Reset OverlayShadowImageSrc in case it may have been altered by a delegate
		this.setOverlayShadowImageSrc(null);

		// reset everything
		this.overlay.style.width = '';
		this.overlayshadow.style.width = '';

		this.overlay.style.height = '';
		this.overlayshadow.style.height = '';

		this.overlay.style.left = '-99999px';
		this.overlayshadow.style.left = '';

		this.overlay.style.top = '0';
		this.overlayshadow.style.top = '';

		this.overlay.style.display = '';
		this.overlayshadow.style.display = '';
		
		// dispatch afterClose in case anything else needs to be reset
		this.dispatchEvent('afterClose', this);

		if (AC.Detector.isWebKit()) this.fixSafarisScrollBars();
		
		this.show(null, true);
        
        document.body.removeChild(this.overlay);
        this._isDisplaying = false;

 	},

	fixSafarisScrollBars: function() {
		var scrollTo = 1;
		var windowSize = this.windowSize();
		window.scroll(windowSize.x+scrollTo, windowSize.y+scrollTo);
		window.scroll(windowSize.x, windowSize.y);
 	}
});


Event.onDOMReady(function() {
	AC.OverlayPanel.overlay = new AC.OverlayPanel();
});



AC.ViewMaster.Tracker = Class.create();
Object.extend(AC.ViewMaster.Tracker.prototype, Event.Listener);
Object.extend(AC.ViewMaster.Tracker.prototype, {

	count: 0,
	type: '',

	initialize: function(type, options) {
		this.type = type; // 'page' or 'click', defaults to 'page'
		this.options = options || {};

		this.listenForEvent(AC.ViewMaster, 'ViewMasterDidShowNotification', false, this.sectionDidChange);
		this.listenForEvent(document.event, 'didFinishMovie', false, this.movieDidEnd);
		this.listenForEvent(document.event, 'replayMovie', false, this.movieDidReplay);
	},

	setDelegate: function(delegate) {
		this.delegate = delegate;
	},

	trackingNameForSection: function(section) {
		var id = section.id.replace('MASKED-', '');

		// complex resetting of the id
		// in a delegate so we can reset it whenever we want
		if (this.delegate && typeof(this.delegate.trackingNameForSection) == 'function') {
			id = this.delegate.trackingNameForSection(this, id, section);
		}

		return id;
	},

	sectionDidChange: function(evt) {
		var view = evt.event_data.data.sender;
		var incoming = evt.event_data.data.incomingView;
		if (incoming && !incoming.content.hasClassName('sneaky')) {
			// default if we don't have a delegate tracking function
			var properties = {};
			var id = this.trackingNameForSection(incoming);

			if (id) {
				properties.pageName = AC.Tracking.pageName() + ' - '+ id +' (JP)';

				// special if our section is a movie
				if (incoming.movieLink && incoming.movieLink.href) {
					properties.pageName = 'V@S: '+ properties.pageName;
					properties.prop13 = properties.pageName.replace(/\s*\([A-Z][A-Z]\)/g,'');
					properties.prop4 = incoming.movieLink.href;
				}

                if (this.delegate && typeof(this.delegate.sectionDidChange) == 'function') {
                    properties = this.delegate.sectionDidChange(this, view, incoming, id, properties);
                }

				if (this.type == 'click') {
					properties.prop3 = properties.pageName.replace(/\s*\([A-Z][A-Z]\)/g,'');
					properties.pageName = AC.Tracking.pageName() + ' (JP)';
					AC.Tracking.trackClick(properties, view, 'o', properties.prop3);
				} else {
					AC.Tracking.trackPage(properties);
				}

				this.count++;
			}
		}
	},

	movieDidEnd: function(evt) {
		var section = evt.event_data.data;

		var properties = {};
		var id = this.trackingNameForSection(section);

		if (id) {
			properties.pageName = AC.Tracking.pageName() + ' - '+ id +' (JP)';

			if (section.movieLink && section.movieLink.href) {
				properties.pageName = 'V@E: '+ properties.pageName;
				properties.prop13 = properties.pageName.replace(/\s*\([A-Z][A-Z]\)/g,'');
			}

            if (this.delegate && typeof(this.delegate.movieDidEnd) == 'function') {
                properties = this.delegate.movieDidEnd(this, section, id, properties);
            }

			AC.Tracking.trackClick(properties, section, 'o', properties.pageName);
		}
	},

	movieDidReplay: function(evt) {
		var section = evt.event_data.data;

		var properties = {};
		var id = this.trackingNameForSection(section);

		if (id) {
			properties.pageName = AC.Tracking.pageName() + ' - '+ id +' (JP)';

			// special if our section is a movie
			if (section.movieLink && section.movieLink.href) {
				properties.pageName = 'V@R: '+ properties.pageName;
				properties.prop13 = properties.pageName.replace(/\s*\([A-Z][A-Z]\)/g,'');
				properties.prop4 = section.movieLink.href;
			}

            if (this.delegate && typeof(this.delegate.movieDidReplay) == 'function') {
                properties = this.delegate.movieDidReplay(this, section, id, properties);
            }

			if (this.type == 'click') {
				properties.prop3 = properties.pageName;
				properties.pageName = AC.Tracking.pageName() + ' (JP)';
				AC.Tracking.trackClick(properties, section, 'o', properties.prop3);
			} else {
				AC.Tracking.trackPage(properties);
			}
		}
	}

});
function initializeSearch(form, view, options) {

	form = $(form);
	view = $(view);
	options = options || {};
	if (options.weeklyTag) weeklyTag = options.weeklyTag;

	if (form && view) {
		var itunesSearch = new iTunesSearch(form, view, 'JP', options);

		//if a weeklytag was given, apply it to links in the weekly module
		if (typeof(weeklyTag) != 'undefined') {

			AC.Tracking.tagLinksWithin(view, 'v0', weeklyTag, function(link) {
				if (link.href) {
					return !!(link.href.match(/itms:\/\/|phobos|\/\/itunes\.apple\.com/));
				} else {
					return false;
				}
			});
		}
	}
}



if (typeof(Search) == 'undefined') { Search = {}; }

Search.DirectCallbacks = [];
 
/**
 * Base class for search requests which directly hit a json service
 */
Search.DirectRequest = function() {};
Search.DirectRequest.prototype = {
	
	s: null,
	r: null,
	url: null,
	options: null,
	
	baseInitialize: function(server, request, options) {
		
		this.s = server;
		this.r = request;
		
		this.options = options;
		
		if (!this.options) {
			options = [];
		}
		
		if (typeof(this.options.onSuccess) != 'function') {
			this.options.onSuccess = Prototype.emptyFunction;
		}
		
		if (typeof(this.options.onFailure) != 'function') {
			this.options.onFailure = Prototype.emptyFunction;
		}
		
		this.url = this.s + this.r + '&output=json';
	},
	
	execute: function() {
		
		var callback = this.parseResponse.bind(this);
		Search.DirectCallbacks.push(callback);
		var callbackNumber = Search.DirectCallbacks.length - 1;
	
		var callbackString = encodeURIComponent('Search.DirectCallbacks[' + callbackNumber + ']');
		
		var scriptNode = document.createElement('script');
		scriptNode.setAttribute('charset', 'utf-8');
		scriptNode.setAttribute('type', 'text/javascript');
        // Prevent client from passing along their own callback attribute to the iTunes Search Service
		scriptNode.setAttribute('src', this.url.replace(/&callback/g, "") + '&callback=' + callbackString);

		
		var head = document.getElementsByTagName('head')[0];
		
		head.appendChild(scriptNode);
	},
	
	abort: Prototype.emptyFunction,
	
	parseResponse: function(response) {}
	
};

/**
 * Search that hits iTunes services directly
 * Tries to provide same client interface as any other search
 */
Search.iTunesSearchRequest = Class.create();
Object.extend(Search.iTunesSearchRequest.prototype, Search.DirectRequest.prototype);
Object.extend(Search.iTunesSearchRequest.prototype, {
	
	s: 'http://ax.phobos.apple.com.edgesuite.net/WebObjects/MZStoreServices.woa/wa/itmsSearch',
	afterParsing: Prototype.emptyFunction,
	
	initialize: function(request, options) {
		this.baseInitialize(this.s, request, options);
		this.afterParsing = this.options.onSuccess;
		this.options.onSuccess = this.parseResponse.bind(this);
	},
	
	parseResponse: function(response) {
		var results = {itunes: response.results};
		this.afterParsing(this, results);
	}
});

var iTunesSearch = Class.create();
Object.extend(iTunesSearch.prototype, Event.Listener);
Object.extend(iTunesSearch.prototype, {
	
	form: null,
	searchField: null,

	recentTerm: null,
	
	recentPanel: null,
	
	searches: null,
	
	failures: 0,
	successes: 0,
	
	country: 'JP',
	
	initialize: function(form, wrapper, country, options) {
		this.searches = [];
		
		this.form = $(form);
		this.wrapper = $(wrapper);
		this.country = country;
		this.options = options || {};
		
		this.form.getElementsByClassName('search-submit')[0].hide();
		
		this.searchField = this.form.getElementsByClassName('search-field')[0];
		
		this.form.observe('submit', function(evt) {
			Event.stop(evt);
			var term = this.searchField.value; //TODO escape term as necessary
			this.search(term);
		}.bind(this));
		
		//TODO observe esc key/clearing search field as way to close search results
	},
	
	search: function(term) {
		
		this.searches = [];
		this.failures = 0;
		this.successes = 0;
		
		this.recentTerm = term;
		
		if (this.resultsPanel) {
			this.resultsPanel.remove();
		}
		this.resultsPanel = $(document.createElement('div'));
		this.resultsPanel.addClassName('search-results');
		if(!AC.Detector.isIE()) this.resultsPanel.addClassName('loading');
		this.wrapper.appendChild(this.resultsPanel);
		
		var header = $(document.createElement('h3'));
		header.innerHTML = "Search results for '" + this.recentTerm + "'";
		header.addClassName('header');
		this.resultsPanel.appendChild(header);

		var progress = $(document.createElement('div'));
		progress.addClassName('progress');
		progress.innerHTML = "searching";
		this.resultsPanel.appendChild(progress);

		var closeButton = $(document.createElement('a'));
		closeButton.addClassName('close');
		closeButton.innerHTML = "Close Search";
		closeButton.observe('click', function(evt) {
			Event.stop(evt);
			this.stop();
		}.bind(this));
		
		this.resultsPanel.appendChild(closeButton);

		var limit = this.options.limit || 3;

		var albumSearch = new ScopedSearch(this.recentTerm, this.resultsPanel, "Albums", {media: 'music', entity: 'album', limit: limit, country: this.country});
		var songSearch = new ScopedSearch(this.recentTerm, this.resultsPanel, "Songs", {media: 'music', entity: 'musicTrack', limit: limit, country: this.country});
		var moviesSearch = new ScopedSearch(this.recentTerm, this.resultsPanel, "Movies", {media: 'movie', entity: 'movie', limit: limit, country: this.country});
		var tvshowsSearch = new ScopedSearch(this.recentTerm, this.resultsPanel, "TV Shows", {media: 'tvShows', entity: 'tvSeason', limit: limit, country: this.country});
		var podcastSearch = new ScopedSearch(this.recentTerm, this.resultsPanel, "Podcasts", {media: 'podcast', entity: 'podcast', limit: limit, country: this.country});
		
		this.otherSearches = $(document.createElement('div'));
		this.otherSearches.addClassName('also-search');
		
		var otherHeader = document.createElement('h3');
		Element.addClassName(otherHeader, 'header');
		otherHeader.innerHTML = 'Also See';
		this.otherSearches.appendChild(otherHeader);
		
		this.resultsPanel.appendChild(this.otherSearches);
		
		var musicVideoSearch = new QuickScopedSearch(this.recentTerm, this.otherSearches, "Music Videos", {media: 'musicVideo', entity: 'musicVideo', limit: 1, country: this.country});
		var audiobookSearch = new QuickScopedSearch(this.recentTerm, this.otherSearches, "Audiobooks", {media: 'audiobook', entity: 'audiobook', limit: 1, country: this.country});
		
		//TODO classing the scoped search based on media type for resizing art?
		
		this.searches = this.searches.concat([albumSearch, songSearch, moviesSearch, tvshowsSearch, podcastSearch, musicVideoSearch, audiobookSearch]);
		
		for (var i = 0; i < this.searches.length; i++) {
			this.listenForEvent(this.searches[i], 'onNoResults', false, this.acknowledgeNoResults.bind(this));
			this.listenForEvent(this.searches[i], 'onResults', false, this.acknowledgeResults.bind(this));
			this.searches[i].search();
		}
	},
	
	stop: function() {
		
		if (this.resultsPanel) {
			this.resultsPanel.remove();
			this.resultsPanel = null;
		}
		
		return false;
		//TODO kill al open requests?
	},
	
	acknowledgeResults: function() {
		this.successes++;
		
		if (this.failures + this.successes == this.searches.length) {
			this.reportResults();
		}
	},
	
	acknowledgeNoResults: function() {
		this.failures++;
		
		if (this.searches.length == this.failures) {
			this.reportNoResults();
		} else if (this.failures + this.successes == this.searches.length) {
			this.reportResults();
		}
	},
	
	reportResults: function() {
		
		//if none of the alternate searches came back, hide the column
		if ($A(this.otherSearches.getElementsByTagName('a')).length <= 0) {
			this.otherSearches.hide();
		}
		
		$(this.resultsPanel.getElementsByClassName('progress')[0]).remove();
		this.resultsPanel.removeClassName('loading');
		
	},
	
	reportNoResults: function() {
		
		this.resultsPanel.innerHTML = '';
		this.resultsPanel.removeClassName('loading');
		this.resultsPanel.addClassName('no-results');
		
		var notice = document.createElement('h3');
		notice.innerHTML = 'Your search did not match any results.';
		this.resultsPanel.appendChild(notice);
		notice = null;
		
		var instructions = document.createElement('p');
		instructions.innerHTML = 'Try searching again, or ';
		
		var storeLink = document.createElement('a');
		storeLink.setAttribute('href', 'http://phobos.apple.com/WebObjects/MZStore.woa/wa/storeFront');
		storeLink.innerHTML = 'browse the iTunes store';
		instructions.appendChild(storeLink);
		instructions.innerHTML += '.';
		storeLink = null;
		
		this.resultsPanel.appendChild(instructions);
		instructions = null;
		
		var close = $(document.createElement('a'));
		close.addClassName('verbose-close');
		close.innerHTML = 'close search';
		this.resultsPanel.appendChild(close);
		
		close.onclick = this.stop.bind(this);
		
	}
	
});


var ScopedSearch = Class.create();
Object.extend(ScopedSearch.prototype, Event.Publisher);
Object.extend(ScopedSearch.prototype, {
	
	term: null,
	container: null,
	options: null,
	label: null,
	
	awaitingResponse: null,
	
	initialize: function(term, container, label, options) {
		
		this.term = term;
		this.container = $(container);
		this.options = options || {};
		this.label = label;
		
		this.render();
	},
	
	render: function() {
		this.resultsPanel = $(document.createElement('div'));
		this.resultsPanel.addClassName('category');
		this.resultsPanel.addClassName('loading');
		
		var heading = document.createElement('h3');
		Element.addClassName(heading, 'heading');
		heading.innerHTML = this.label;
		this.resultsPanel.appendChild(heading);
		
		this.resultsList = $(document.createElement('span'));
		this.resultsPanel.appendChild(this.resultsList);
		
		this.container.appendChild(this.resultsPanel);
	},
	
	search: function() {
		
		var country = this.options.country || 'JP';
		this.limit = this.options.limit || 1;
		
		var media = this.options.media || 'all';
		var entity = this.options.entity ? '&entity=' + this.options.entity : ''; 
		
		var requestUrl = '?media=' + media + entity + '&country=' + country + '&limit=' + this.limit + '&term=' + this.term;
		
		var request = new Search.iTunesSearchRequest(requestUrl, {
			onSuccess: this.parseResults.bind(this)})
		
		request.execute();
		
		this.awaitingResponse = setTimeout(this.reportNoResults.bind(this), 15000);
		
	},
	
	parseResults: function(request, response) {
	
		clearTimeout(this.awaitingResponse);
		
		if (this.resultsList) {
			this.resultsList.remove();
		}
		this.resultsPanel.removeClassName('loading');
		
		if (response.itunes.length > 0) {
			this.reportResults(response.itunes);
		} else {
			this.reportNoResults();
		}
	},
	
	reportResults: function(data) {
		
		this.dispatchEvent('onResults', this);
		
		this.resultsList = document.createElement('ul');

		for (var i = 0; i < data.length; i++) {
			var resultData = data[i];
			var result = $(document.createElement('li'));

			if (i < 2*this.limit/3) {
				
				result.addClassName('art')
				
				var art = document.createElement('img');
				art.setAttribute('src', resultData.artworkUrl60);

				var artLink = document.createElement('a');
				Element.addClassName(artLink, 'thumb');
				artLink.setAttribute('href', resultData.itemLinkUrl);
				artLink.appendChild(art);

				result.appendChild(artLink);
			}

			var link = document.createElement('a');
			Element.addClassName(link, 'title');
			link.setAttribute('href', resultData.itemLinkUrl);
			link.innerHTML = resultData.itemCensoredName.truncate(16);
			result.appendChild(link);

            var artistLink;
            if (resultData.artistLinkUrl) {
			    artistLink = document.createElement('a');
			    artistLink.setAttribute('href', resultData.artistLinkUrl);
			} else {
			    artistLink = document.createElement('span');
			}
			artistLink.innerHTML = resultData.artistName.truncate(16);
			result.appendChild(artistLink);

			this.resultsList.appendChild(result);
		}
		
		this.resultsPanel.appendChild(this.resultsList);

		var media = this.options.media || 'all'; //TODO replace hardcoded feault here with a default property on this class		
		var entity = (this.options.entity && this.options.entity != 'musicTrack') ? '&entity=' + this.options.entity : '';
		
		var storeUrl = "http://ax.phobos.apple.com.edgesuite.net/WebObjects/MZSearch.woa/wa/com.apple.jingle.search.DirectAction/search?submit=seeAllLockups&term=" + this.term + "&media=" + media + entity;
		
		var storeLink = $(document.createElement('a'));
		storeLink.setAttribute('href', storeUrl);
		storeLink.addClassName('store');
		storeLink.innerHTML = 'View all in iTunes';
		this.resultsPanel.appendChild(storeLink);
		
	},
	
	reportNoResults: function() {

		this.resultsPanel.addClassName('no-results');
		
		this.resultsList = document.createElement('span');
		this.resultsList.innerHTML = "No results";
		this.resultsPanel.appendChild(this.resultsList);
		
		this.dispatchEvent('onNoResults', this);
	}
	
});

var QuickScopedSearch = Class.create();
Object.extend(QuickScopedSearch.prototype, ScopedSearch.prototype);
Object.extend(QuickScopedSearch.prototype, {
	
	render: function() {
		this.resultsPanel = $(document.createElement('div'));
		this.resultsPanel.addClassName('loading');
		this.container.appendChild(this.resultsPanel);
	},
	
	reportResults: function(data) {
		
		this.dispatchEvent('onResults', this);
		
		var media = this.options.media || 'all';
		var entity = (this.options.entity && this.options.entity != 'musicTrack') ? '&entity=' + this.options.entity : '';
		
		var storeUrl = "http://ax.phobos.apple.com/WebObjects/MZStoreServices.woa/wa/search?submit=seeAllLockups&term=" + this.term + "&media=" + media + entity;
		
		var storeLink = $(document.createElement('a'));
		storeLink.setAttribute('href', storeUrl);
		storeLink.addClassName('store');
		storeLink.innerHTML = this.label;
		
		var heading = document.createElement('h3');
		heading.appendChild(storeLink);
		
		this.resultsPanel.appendChild(heading);
		
	},
	
	reportNoResults: function() {
		this.dispatchEvent('onNoResults', this);
	}
	
});

var superOptions = {};
var tracker = null;

var MediaTypes = {
	newReleases: {
		name: "ニューリリース",
		directory: "music/",
		suffix: "newreleases-enhanced.inc",
		genres: new Hash({
			all: { name: "ニューリリース", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewRoom?fcId=186000347&id=1" }
		})
	},
	
	music: {
		name: "ミュージック",
		directory: "music/",
		suffix: "topsongs-enhanced.inc",
		genres: new Hash({
			all: { name: "トップソング", link:"http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=1&popId=1" },
			jpop: { name: "Ｊ−ＰＯＰ", link: 27 },
			alternative: { name: "オルタナティブ", link: 20 },
			blues: { name: "ブルース", link: 2 },
			classical: { name: "クラシック", link: 5 },
			dance: { name: "ダンス", link: 17 },
			electronic: { name: "エレクトロニック", link: 7 },
			hiphoprap: { name: "ヒップホップ/ラップ", link: 18 },
			jazz: { name: "ジャズ", link: 11 },
			kayokyoku: { name: "歌謡曲", link: 30 },
			pop: { name: "ポップ", link: 14 },
			rbsoul: { name: "Ｒ＆Ｂ/ソウル", link: 15 },
			rock: { name: "ロック", link: 21 },
			soundtrack: { name: "サウンドトラック", link: 16 },
			vocal: { name: "ヴォーカル", link: 23 },
			world: { name: "ワールド", link: 19 }
		})
	},
			
	albums: {
		name: "Albums",
		directory: "music/",
		suffix: "topalbums-enhanced.inc",
		genres: new Hash({
			all: { name: "トップアルバム", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=1&popId=11" },
			jpop: { name: "Ｊ−ＰＯＰ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=1024&popId=11"},
			alternative: { name: "オルタナティブ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=21&popId=11" },
			blues: { name: "ブルース", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=2&popId=11" },
			classical: { name: "クラシック", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=5&popId=11" },
			dance: { name: "ダンス", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=18&popId=11" },
			electronic: { name: "エレクトロニック", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=7&popId=11" },
			hiphoprap: { name: "ヒップホップ/ラップ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=19&popId=11" },
			jazz: { name: "ジャズ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=12&popId=11" },
			kayokyoku: { name: "歌謡曲", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=1025&popId=11" },
			enka: { name: "演歌", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=1026&popId=11" },
			pop: { name: "ポップ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=15&popId=11" },
			rbsoul: { name: "Ｒ＆Ｂ/ソウル", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=16&popId=11" },
			rock: { name: "ロック", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=24&popId=11" },
			soundtrack: { name: "サウンドトラック", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=17&popId=11" },
			vocal: { name: "ヴォーカル", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=26&popId=11" },
			world: { name: "ワールド", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=20&popId=11" },
			childrensmusic: { name: "チルドレン", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=4&popId=11" },
			country: { name: "カントリー", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=6&popId=11" },
			folk: { name: "フォーク", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=11&popId=11" },
			latinjazz: { name: "ラテン", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=13&popId=11" },
			newage: { name: "ニューエイジ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=14&popId=11" }
		})
	},

	audiobooks: {
		name: "オーディオブック",
		directory: "audiobooks/",
		suffix: "topaudiobooks-enhanced.inc",
		genres: new Hash({
			all: { name: "トップオーディオブック", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=28&popId=8" },
			artsentertainment: { name: "アート&エンターテイメント", link: 50000041 },
			audiobooksinspanish: { name: "Audiobooks Latino", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewGenre?id=50000070" },
			biographymemoir: { name: "伝記&自叙伝", link: 50000042 },
			selfdevelopment: { name: "自己啓発", link: 50000056 },
			speakersstorytellers: { name: "ナレーター", link: 50000048 },
			business: { name: "ビジネス", link: 50000043 },
			classics: { name: "クラシック/古典", link: 50000045 },
			comedy: { name: "コメディ", link: 50000046 },
			dramapoetry: { name: "小説", link: 50000047 },
			fiction: { name: "フィクション", link: 50000040 },
			history: { name: "歴史", link: 50000049 },
			kidsyoungadults: { name: "キッズ&ヤングアダルト", link: 50000044 },
			languages: { name: "言語", link: 50000050 },
			mystery: { name: "ミステリー", link: 50000051 },
			news: { name: "ニュース", link: 74 },
			nonfiction: { name: "ノンフィクション", link: 50000052 },
			showsperiodicals: { name: "番組&定期刊行物", link: 75 },
			religionspirituality: { name: "宗教&スピリチュアル", link: 50000053 },
			romance: { name: "恋愛", link: 50000069 },
			scififantasy: { name: "サイエンスフィクション&ファンタジー", link: 50000055 },
			science: { name: "科学", link: 50000054 },
			sports: { name: "スポーツ", link: 50000057 },
			technology: { name: "テクノロジー", link: 50000058 },
			traveladventure: { name: "トラベル&アドベンチャー", link: 50000059 }
		})
	},
			
	podcasts: {
		name: "Podcasts",
		directory: "podcasts/",
		suffix: "toppodcasts-enhanced.inc",
		genres: new Hash({
			all: { name: "トップPodcast", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewGenre?id=26" },
			arts: { name: "アート", link: 1301 },
			business: { name: "ビジネス", link: 1321 },
			comedy: { name: "コメディ", link: 1303 },
			education: { name: "教育", link: 1304 },
			gameshobbies: { name: "ゲーム/趣味", link: 1323 },
			governmentorganizations: { name: "行政/団体", link: 1325 },
			health: { name: "健康", link: 1307 },
			kidsfamily: { name: "キッズ/ファミリー", link: 1305 },
			music: { name: "ミュージック", link: 1310 },
			newspolitics: { name: "ニュース/政治", link: 1311 },
			religionspirituality: { name: "宗教&スピリチュアル", link: 1314 },
			sciencemedicine: { name: "科学/医学", link: 1315 },
			societyculture: { name: "社会/文化", link: 1324 },
			sportsrecreation: { name: "スポーツ/レクリエーション", link: 1316 },
			technology: { name: "テクノロジー", link: 1318 },
			tvfilm: { name: "テレビ/映画", link: 1309 }
		})
	},
		
	topapps: {
		name: "App Store",
		directory: "topapps/",
		suffix: "topapplications-enhanced.inc",
		genres: new Hash({
			all: { name: "トップアプリ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewGenre?id=36&mt=8" },
			books: { name: "電子書籍", link: 6018 },
			business: { name: "ビジネス", link: 6000 },
			education: { name: "教育", link: 6017 },
			finance: { name: "ファイナンス", link: 6015 },
			entertainment: { name: "エンターテイメント", link: 6016 },
			games: { name: "ゲーム", link: 6014 },
			healthcarefitness: { name: "健康&フィットネス", link: 6013 },
			productivity: { name: "仕事効率化", link: 6007 },
			photography: { name: "写真", link: 6008 },
			sports: { name: "スポーツ", link: 6004 },
			socialnetworking: { name: "ソーシャルネットワーキング", link: 6005 },
			weather: { name: "天気", link: 6001 },
			navigation: { name: "ナビゲーション", link: 6010 },
			news: { name: "ニュース", link: 6019 },
			music: { name: "ミュージック", link: 6011 },
			utilities: { name: "ユーティリティ", link: 6002 },
			lifestyle: { name: "ライフスタイル", link: 6012 },
			travel: { name: "旅行", link: 6003 },
			reference: { name: "レファレンス", link: 6006 }
		})
	},

	toppaidapps: {
		name: "App Store",
		directory: "topapps/",
		suffix: "toppaidapplications-enhanced.inc",
		genres: new Hash({
			all: { name: "トップ有料アプリ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewTop?id=25209&popId=30" }
		})
	},

	newapps: {
		name: "App Store",
		directory: "topapps/",
		suffix: "newapplications-enhanced.inc",
		genres: new Hash({
			all: { name: "新着アプリ", link: "http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewRoom?fcId=285099695&genreIdString=36&mediaTypeString=Mobile+Software+Applications" }
		})
	}
			
};



var iTunesModuleSection = {

	topLists: function() {
		var lists = this.content.select('.toplist');
		lists.each(this.topList.bind(this));
	},

	topList: function(list, i) {
		var media = list.id.replace(/-.*/, '');
		var genre = (list.className.match(/genre-/)) ? list.className.match(/.*genre-([^ ]*).*/)[1] : null;
		var cookie = (list.className.match('nopref')) ? null : list.id.replace('-toplist', '');

		var options = Object.extend({}, superOptions);
		options.defaultMedia = media;
		options.defaultGenre = genre;
		options.cookieId = cookie;

		var topList = new TopList(list.id, options);
	}

};

var iTunesModuleDelegate = {

	willShow: function(view, outgoing, incoming) {
		if (outgoing) {
			outgoing._triggers.each(function(trigger) {
				var item = trigger.up('li');
				if (item) item.removeClassName('active');
			});
		}

		if (incoming) {
			incoming.triggers();
			incoming.content.show();
			incoming._triggers.each(function(trigger) {
				var item = trigger.up('li');
				if (item) item.addClassName('active');
			});
		}

		//tracker.setDelegate(iTunesModuleTrackerDelegate);
	},

	didAppendContent: function(view, content) {
		this.extendSection(view, content);
	},

	extendSection: function(view, content) {
		var incoming = view.currentSection;
		if (!incoming.topLists) {
			Object.extend(incoming, iTunesModuleSection);
			incoming.topLists();

			var title = superOptions.trackingPrefix || 'iTunes this week';
			if (incoming._triggers[0]) title += ' - '+ incoming._triggers[0].innerHTML;

			$(incoming.content).observe('mousedown', function(evt) {
				var clickedLink = evt.findElement('a');
				if (clickedLink) {
					var name = false;

					var topList = clickedLink.up('.toplist');
					if (topList) {
						var topListTitle = topList.down('.title');
						if (topListTitle) {
							name = title+' - '+topListTitle.innerHTML;
						} else {
							name = title+' - Top List';
						}
					}

					var promo = clickedLink.up('.splashes') || clickedLink.up('.bricks');
					if (promo) {
						var promoTitle = promo.down('h3') || promo.down('h2') || promo.down('h4');
						if (promoTitle) {
							name = title+' - '+promoTitle.innerHTML;
						} else {
							name = title+' - Promo';
						}
					}

					if (name) {
						var properties = { 
									prop3:AC.Tracking.pageName() + ' - '+name, 
									pageName: AC.Tracking.pageName() + ' (JP)'
									};
						AC.Tracking.trackClick(properties, this, 'o', name);
					}
				}
			});

			return title;
		}
	},

	didShow: function(view, outgoing, incoming) {
		this.willShow(view, outgoing, incoming);
		this.didShow = null;
	}

};

var iTunesModule = Class.create({

	initialize: function(contents, view, triggerClassName, options) {
		var trigger = $$('.'+triggerClassName);
		trigger[0].up('ul').style.display = 'block';

		//For IE we need to remove this node before swap view takes over
		//because swap view's innerHTML = '', breaks the splash
		if (Object.isArray(contents)) {
			contents[0].remove();
			document.body.appendChild(contents[0].hide());
		} else if (Object.isElement(contents)) {
			contents = contents.remove();
			document.body.appendChild(contents.hide());
		}

		superOptions = options || {};
		if (superOptions.initialSection) superOptions.initialId = 'itunesmodule-'+superOptions.initialSection;
		if (!superOptions.initialId) superOptions.initialId = 'itunesmodule-featured';
		if (!superOptions.shouldAnimateContentChange) superOptions.shouldAnimateContentChange = false;
		if (!superOptions.silentTriggers) superOptions.silentTriggers = true;

		var sections = [];
		trigger.each(function(section) {
			var content = $(section.href.replace(/.*#/, ''));
			if (content) {
				sections.push(content);
			} else {
				sections.push(section);
			}
		});

		var viewer = new AC.ViewMaster.Viewer(sections, view, triggerClassName, superOptions);
		viewer.setDelegate(iTunesModuleDelegate);

		viewer.sections.each(function(section) {
			if (!section.value.isContentRemote()) iTunesModuleDelegate.extendSection({ currentSection:section.value })
		});

		// setup the slideshow
		if (superOptions.startSlideshowAutomatically) {
			var slideshow = new AC.ViewMaster.Slideshow(viewer, 'progress', {
				autoplay: true,
				delay: 10000
			});

			// stop the slideshow on click of anything inside the module
			$(view).observe('click', slideshow.stop.bind(slideshow));
			trigger.each(function(section) {
				section.observe('click', slideshow.stop.bind(slideshow));
			});
		}

		// tracking only on click, and not on slideshow, so we are doing it by hand
		trigger.each(function(section) {
			section.observe('mousedown', function(evt) {
				if (section && section.up('#itunesmodule')) {
					var properties = {};

					var title = superOptions.trackingPrefix || 'iTunes this week';
					title += ' - ';

					var name = section.innerHTML;

					properties.pageName = AC.Tracking.pageName() + ' (JP)';
					properties.prop3 = AC.Tracking.pageName() +' - '+ title+name +' (JP)';
					AC.Tracking.trackClick(properties, view, 'o', properties.pageName);
				}
			});
		});
	}

});





var TopList = Class.create({

	rootChartPath: '/itunescharts/',
	countryPath: 'japan/',

	orderedMediaTypes: ['music','movies','audiobooks','podcasts','appstore'],

	container: null,
	preferencePanel: null,
	populated: false,
	isCustomized: false,

	initialize: function(container, options) {
		this.container = $(container);
		this.options = options || {};

		this.listing = new Element('ul');

		var existingListing = this.container.down('.listing');
		if (existingListing) {
			this.listing = existingListing;
			this.populated = true;
		} else {
			this.container.appendChild(this.listing);
		}

		this.storeLink = this.container.down('.storelink');
		if (!this.storeLink) {
			this.storeLink = $(document.createElement('a'));
			this.storeLink.setAttribute('href', 'http://phobos.apple.com/WebObjects/MZStore.woa/wa/storeFront');
			this.storeLink.addClassName('storelink');
			this.storeLink.innerHTML = '全て見る';
			this.container.appendChild(this.storeLink);
		}

		if (this.options.cookieId) {
			this.provideConfigurationTrigger();
		}

		this.getInitialConfiguration();

		this.render();
	},

	provideConfigurationTrigger: function() {

		var configureTrigger = $(document.createElement('a'));
		configureTrigger.innerHTML = '設定';
		configureTrigger.addClassName('configure-trigger');

		configureTrigger.observe('click', function(evt) {
            // Event.stop(evt);
			this.showPreferences();
		}.bind(this));

		this.container.appendChild(configureTrigger);
		configureTrigger = null;
	},

	getInitialConfiguration: function() {

		var loadConfiguration = function(cookieId) {

			var cookies = document.cookie.split(';');

			var foundCookie = null;

			for (var i = 0; i < cookies.length; i++) {
				var foundCookie = cookies[i].match('topLists');
				if (foundCookie) {
					var values = cookies[i].toQueryParams();

					var media = values[cookieId + '-media'];
					var genre = values[cookieId + '-genre'];

					if (media && genre) {
						//toplists cookie had configuration for this list
						return {media: media, genre: genre};
					} else {
						//cookie found, but no configuration for this list
						return null;
					}
				}
			}
		}

		var media = this.options.defaultMedia || 'music';
		var genre = this.options.defaultGenre || 'all';

		if (this.options.cookieId) {
			var savedConfig = loadConfiguration(this.options.cookieId);
			if(savedConfig) {
				this.isCustomized = true;
				media = savedConfig.media;
				genre = savedConfig.genre;
			}
		}


		this.setScope(media, genre);
	},

	providePreferences: function() {

		if (!this.preferencePanel) {

			this.preferencePanel = $(document.createElement('div'));
			this.preferencePanel.addClassName('preferences');

			var genreSelector = Builder.node('select', { 'class':'genres', 'size':this.options.genreSelectSize || 15 })

			var preferenceForm = $(document.createElement('form'));
			this.updateGenreSelector(genreSelector, this.currentMedia);
			preferenceForm.appendChild(genreSelector);

			var submit = $(document.createElement('input'));
			submit.setAttribute('type', 'submit');
			submit.addClassName('submit');
			submit.setAttribute('value', '設定完了');
			preferenceForm.appendChild(submit);

			preferenceForm.observe('submit', function(evt) {
				Event.stop(evt);

				var selects = preferenceForm.getElementsByTagName('select');
				var genre = selects[0].value;

				if (genre == '') {
					return;
				}

				var changed = this.setScope(this.currentMedia, genre, true);
				this.hidePreferences();
				if (changed) {
					this.render(true);
				}

			}.bind(this));

			this.preferencePanel.appendChild(preferenceForm);

			this.container.appendChild(this.preferencePanel);
		}
	},

	updateGenreSelector: function(selector, media) {
		selector.innerHTML = '';

		var genres = MediaTypes[media].genres;
		genres.each(function(genre, i) {
			var prefix = genre[0];
			var name = genre[1].name;

			var genreOption = Builder.node('option', { value:prefix }, name);
			if (this.currentGenre == prefix) genreOption.selected = true;

			selector.appendChild(genreOption);
		}.bind(this));
	},

	setScope: function(media, genre, save) {

		if (media == this.currentMedia && genre == this.currentGenre) {
			return false;
		}

		var saveConfiguration = function(cookieId, media, genre) {
			var d = new Date();
			var expires = 360 * 1000 * 60 * 60 * 24; // 360 days
			var expiresDate = new Date(d.getTime() + (expires));


			//Write to existing cookie if possible
			var cookies = document.cookie.split(';');



			var foundCookie = null;

			for (var i = 0; i < cookies.length; i++) {
				if (cookies[i].match('topLists')) {
					foundCookie = cookies[i];
				}
			}

			var values = {};
			if (foundCookie) {
				values = foundCookie.toQueryParams();
			}

			//create or update entries for this cookie
			values[cookieId + '-media'] = escape(media);
			values[cookieId + '-genre'] = escape(genre);

			var cookieData = '';
			for (var key in values) {
				cookieData += key + '=' + values[key] + '&';
			}
			cookieData = cookieData.replace(/&$/, ''); //remove trailing &

			document.cookie = 'topLists=?' + cookieData + ';expires=' + expiresDate.toGMTString() +';path=/jp/';
		}

		this.currentMedia = media;
		this.currentGenre = genre;

		//this.updateGenreHeading();


		if (save && this.options.cookieId) {
			saveConfiguration(this.options.cookieId, this.currentMedia, this.currentGenre);
		}


		return true;
	},

	updateGenreHeading: function() {
		var current = MediaTypes[this.currentMedia].genres.get(this.currentGenre);

		var genreName = current.name;

		var link = current.link;
		if (typeof(link) == 'number') {
			link = 'http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewGenre?id=' + current.link;
		} else if(link === null || typeof(link) == 'undefined') {
			link = 'http://phobos.apple.com/WebObjects/MZStore.woa/wa/storeFront';
		}
		this.storeLink.setAttribute('href', link);

		var genreHeading = this.container.down('.title');
		var truncate = this.options.titleTruncation || 16;
		genreHeading.innerHTML = genreName.truncate(truncate);
	},

	hidePreferences: function() {
		this.listing.show();
		this.preferencePanel.hide();
	},

	showPreferences: function() {
		this.listing.hide();
		this.providePreferences();
		this.preferencePanel.show();
	},

	render: function(forced) {

		if (!forced && (this.populated && !this.isCustomized)) {
			//ensure static content is truncated the same as dynamic content
			this.truncateResults();
			return;
		}

		this.listing.innerHTML = '';

		var display = function(response) {
			this.listing.innerHTML = response.responseText;
			this.truncateResults();
		};

		var media = MediaTypes[this.currentMedia];

		var url = this.rootChartPath +				// itunescharts/
		this.countryPath + 					// us/
		media.directory + 					// audiobooks/
		this.currentGenre +					// all
		(this.options.resultCount || 5) + 	// 5
		media.suffix;						// topaudiobooks-enhanced.inc

		var listingRequest = new Ajax.Request(url, { 
			method: 'get', 
			onSuccess: display.bind(this) });



		},

		truncateResults: function() {
			var items = this.listing.select('li>a');
			items.each(function(item, i) {
				var title = item.down('strong');
				if (title) title.innerHTML = title.innerHTML.truncate(14);
				var subtitle = item.down('span');
				if (subtitle) subtitle.innerHTML = subtitle.innerHTML.truncate(16);
			});
		}

	})
var loadTemplateHTMLFromRequest = Object.extend(AC.loadRemoteContent.loadTemplateHTMLFromRequest, {});

Object.extend(AC.loadRemoteContent, {
	loadTemplateHTMLFromRequest: function(httpResponse) {
		try {
			var json = httpResponse.responseText.evalJSON();
			var reqURL = httpResponse.request.url;
			var registeredArguments = AC.loadRemoteContent._loadArgumentsByUrl[reqURL];

			var result = new Element('div', {'class': 'storycontent'});
			var re = /^(.{0,80}[0-9a-zA-Z一-龠ぁ-んァ-ヴ])[^a-zA-Z]/;
			var reTitle = /^(.{0,37}[0-9a-zA-Z一-龠ぁ-んァ-ヴ])[^a-zA-Z]/;
			
			json.each(function(storyData, i) {
				if(storyData.copy.length > 81){
					var copy = storyData.copy.match(re)[1]+'…';
				} else {
					var copy = storyData.copy;
				}
				if(storyData.title.length > 38){
					var title = storyData.title.match(reTitle)[1]+'…';
				} else {
					var title = storyData.title;
				}
				result.insert(new Element('h3').update(new Element('a', {href: unescape(storyData.link)}).update(unescape(title))))
				      .insert(new Element('p', {'class': 'date'}).update(unescape(storyData.date)))
				      .insert(new Element('p', {'class': 'copy'}).update(copy))
				      /*.insert(new Element('p', {'class': 'learnmore'}).update(new Element('a', {'class': 'more', href: unescape(storyData.link)}).update('さらに詳しく')));*/
			});

			//invoke the callback with result:
			var callback = registeredArguments.callback;
			callback(result,null,registeredArguments.context);
		}
		catch(e) {
			loadTemplateHTMLFromRequest(httpResponse);
		}
	}
});

function TrackStartpage() {
	var today = new Date();
	var cookie = document.cookie.match('[^|;]?trackStartpage=([^;]*)[;|$]');
	if (cookie) {
		var dateSet = new Date(cookie[1]);
		var daysSet = Math.floor((today - dateSet)/(1000*60*60*24));
	} else {
		var expires = new Date();
		expires.setYear(2050);
		document.cookie = 'trackStartpage='+today+'; expires='+expires.toGMTString()+'; domain=apple.com';
	}
	return daysSet ? daysSet.toString() : '0';
};








$('main').addClassName('hasjs');

// Switch Mac and Windows
if(AC.Detector.isWin()){
	$('sb-windows').addClassName('active'); 
} else if(AC.Detector.isMac()){
	$('sb-mac').addClassName('active');
}

// random trailer
new Ajax.Request('/jp/trailers/home/feeds/featured.json', {
	method:'get',
	onSuccess: function(result) {
		var response = eval(result.responseText);
		var random = Math.floor(Math.random()*response.length)
		var trailer = response[random]

		var elem = new Element('a', {
			'title':trailer.title, 
			'href':trailer.url
		}).update(new Element('img', {
			'src':trailer.poster,
			'border':0,
			'height':193,
			'width':134
		}));
		$('trailers').update(elem)
	}
});


// Hot News Headlines
var links = $$('.storycontentlink');
var viewer = new AC.ViewMaster.Viewer(links, 'storycontent', 'storycontentlink', {
	initialId: 'all'
});

// iTunes module
new iTunesModule($('itunesmodule-panel').down('div.section'), 'itunesmodule-panel', 'module-link', { shouldAnimateContentChange:true });
initializeSearch('itunes-search', 'itunesmodule-panel', { weeklyTag:'WWW-NAUS-ITUWEEKLY-STARTPAGE' });

// Feedback overlay
Event.onDOMReady(function(){
	AC.OverlayPanel.overlay._defaultOverlayShadowSrc = 'http://images.apple.com/startpage/images/feedback_overlay20080805.png';
});