// Simple AJAX Code-Kit (SACK)
	// ©2005 Gregory Wild-Smith
	// www.twilightuniverse.com
	// Software licenced under a modified X11 licence, see documentation or authors website for more details

	function sack(file)
	{
		this.AjaxFailedAlert = "Your browser does not support the enhanced functionality of this website, and therefore you will have an experience that differs from the intended one.\n";
		this.requestFile = file;
		this.method = "POST";
		this.URLString = "";
		this.encodeURIString = true;
		this.execute = false;

		this.onLoading = function() { };
		this.onLoaded = function() { };
		this.onInteractive = function() { };
		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, ccat)
		{
			this.responseStatus = new Array(2);
			
			if(this.failed && this.AjaxFailedAlert)
			{
				alert(this.AjaxFailedAlert); 
			}
			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.element) { this.elementObj = document.getElementById(this.element); }
				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 1:
										self.onLoading();
										break;
							case 2:
										self.onLoaded();
										break;
							case 3:
										self.onInteractive();
										break;
							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(); }
										if (self.elementObj) 
										{
											var elemNodeName = self.elementObj.nodeName;
											elemNodeName.toLowerCase();
											if (elemNodeName == "input" || elemNodeName == "select" || 
												elemNodeName == "option" || elemNodeName == "textarea")
											{
												self.elementObj.value = self.response;
											} 
											else 
											{
												if (ccat == true)
												{
													self.elementObj.innerHTML = self.elementObj.innerHTML + self.response;
												}
												else
												{
													self.elementObj.innerHTML = self.response;
												}
											}
										}
										self.URLString = "";
										break;
						}
					};
				}
			}
		};
		
		this.createAJAX();
	}