// Ajax Scripts //

// Ajax class //
function ajaxClass(){
	this.method = "POST"; this.URLString = ""; this.encodeURIString = true; this.execute = false;
	this.onCompletion = function() { };
	
	this.createAJAX = function() {
		try {
			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (err) {
				this.xmlhttp = null;
			}
		}
		if(!this.xmlhttp && typeof XMLHttpRequest != "undefined") this.xmlhttp = new XMLHttpRequest();
		if (!this.xmlhttp) this.failed = true; 
	};
	
	this.setVar = function(name, value){
		if (this.URLString.length < 3) this.URLString = name + "=" + value;
		else this.URLString += "&" + name + "=" + value;
	}
	
	this.encVar = function(name, value){
		var varString = encodeURIComponent(name) + "=" + encodeURIComponent(value);
		return varString;
	}
	
	this.encodeURLString = function(string){
		varArray = string.split('&');
		for (i = 0; i < varArray.length; i++){
			urlVars = varArray[i].split('=');
			if (urlVars[0].indexOf('amp;') != -1) urlVars[0] = urlVars[0].substring(4);
			varArray[i] = this.encVar(urlVars[0],urlVars[1]);
		}
		return varArray.join('&');
	}
	
	this.runResponse = function(){
		eval(this.response);
	}
	
	this.runAJAX = function(urlstring){
		this.responseStatus = new Array(2);
		if(this.failed && this.AjaxFailedAlert) alert("Sorry, but your browser doesn't support this page's functionality."); 
		else {
			if (urlstring){ 
				if (this.URLString.length) this.URLString = this.URLString + "&" + urlstring; 
				else this.URLString = urlstring;
			}
			if (this.encodeURIString){
				var timeval = new Date().getTime(); 
				this.URLString = this.encodeURLString(this.URLString);
				this.setVar("rndval", timeval);
			}
			if (this.xmlhttp) {
				var self = this;
				if (this.method == "GET") {
					var totalurlstring = this.requestFile + "?" + this.URLString;
					this.xmlhttp.open(this.method, totalurlstring, true);
				} else this.xmlhttp.open(this.method, this.requestFile, true);
				if (this.method == "POST"){
  					try {
						this.xmlhttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded') 
					} catch (e) {}
				}
				this.xmlhttp.send(this.URLString);
				this.xmlhttp.onreadystatechange = function() {
					switch (self.xmlhttp.readyState){
						case 4:
							self.response = self.xmlhttp.responseText;
							self.responseXML = self.xmlhttp.responseXML;
							self.responseStatus[0] = self.xmlhttp.status;
							self.responseStatus[1] = self.xmlhttp.statusText;
							self.onCompletion();
							if(self.execute) self.runResponse();
							self.URLString = "";
						break;
					}
				};
			}
		}
	};
	this.createAJAX();
}

//Initialise
var ajax = new ajaxClass();