PageNav=Class.create({initialize:function(a,b,d,c){this.container=$(a);this.content=$(d);
this.getElement(b);if(this.container&&this.container.empty()&&this.item){this.getPrevious();
this.getNext();this.writeLinks()}},getElement:function(a){var b=document.body.id;
if(b){this.item=$(a+b)}},getPrevious:function(){this.previous=this.item.previousSibling;
while(this.previous&&(!this.previous.tagName||this.previous.tagName.toLowerCase()!="li")){this.previous=this.previous.previousSibling
}var a=this.item.parentNode.previousSibling;while(a&&(!a.tagName||a.tagName.toLowerCase()!="h2")){a=a.previousSibling
}if(!this.previous&&a){this.previous=a}if(this.previous){this.previous=$(this.previous);
this.previous=this.writeWrappers(this.previous);this.previous.className+=" previous";
this.previous.className=this.previous.className.strip()}},getNext:function(){this.next=this.item.nextSibling;
while(this.next&&(!this.next.tagName||this.next.tagName.toLowerCase()!="li")){this.next=this.next.nextSibling
}if(this.next){this.next=$(this.next);this.next=this.writeWrappers(this.next);this.next.className+=" next";
this.next.className=this.next.className.strip()}},writeWrappers:function(b){var a=b.down("a");
if(!a){return false}var d=$(b.down("a").cloneNode(true));d.addClassName("arrow");
var c=Builder.node("div",[d]);return c},writeLinks:function(){if(this.previous&&this.previous.nodeType==1){this.container.appendChild(this.previous)
}if(this.next&&this.next.nodeType==1){this.container.appendChild(this.next)}}});
Event.onDOMReady(function(){new PageNav("pagenav","fn-","featurenav","li");$$("#featurenav a").each(function(a){a.observe("mousedown",function(b){document.cookie="s_iphone_nav=left nav; domain=.apple.com; path=/"
})});$$("#pagenav a").each(function(a){a.observe("mousedown",function(b){document.cookie="s_iphone_nav=bottom nav; domain=.apple.com; path=/"
})})},false);