// jsr_class.js
//
// JSONscriptRequest -- a simple class for making HTTP requests
// using dynamically generated script tags and JSON
//
// Author: Jason Levitt
// Date: December 7th, 2005
//

// Constructor -- pass a REST request URL to the constructor
// Modified to only allow requests to www.info.apple.com

function JSONscriptRequest(domain, urlpath) {
    // REST request path
    
    if(domain.substring(domain.length-10,25)==".apple.com") {
    
	    this.fullUrl = "http://www.info.apple.com/" + urlpath;

	    // Keep IE from caching requests
	    this.noCacheIE = '&noCacheIE=' + (new Date()).getTime();
	    // Get the DOM location to put the script tag
	    this.headLoc = document.getElementsByTagName("head").item(0);
	    // Generate a unique script tag id
	    this.scriptId = 'JscriptId' + JSONscriptRequest.scriptCounter++;

	}

}

// Static script ID counter
JSONscriptRequest.scriptCounter = 1;

// buildScriptTag method
//
JSONscriptRequest.prototype.buildScriptTag = function () {

    // Create the script tag
    this.scriptObj = document.createElement("script");
    
    // Add script object attributes
    this.scriptObj.setAttribute("type", "text/javascript");
    this.scriptObj.setAttribute("charset", "utf-8");
    this.scriptObj.setAttribute("src", this.fullUrl + this.noCacheIE);
    this.scriptObj.setAttribute("id", this.scriptId);
}
 
// removeScriptTag method
// 
JSONscriptRequest.prototype.removeScriptTag = function () {
    // Destroy the script tag
    this.headLoc.removeChild(this.scriptObj);  
}

// addScriptTag method
//
JSONscriptRequest.prototype.addScriptTag = function () {
    // Create the script tag
    this.headLoc.appendChild(this.scriptObj);
}