/* 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 = "GET";
	this.URLString = "";
	this.encodeURIString = true;
	this.execute = false;

	this.responseHandler = null;
	
	this.onLoading = function() { };
	this.onLoaded = function() { };
	this.onInteractive = function() { };
	this.onCompletion = function(strData) { 
		if (this.responseHandler){
			this.responseHandler(strData);
		}
		};

	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(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;
							
							// Fire response with returned data
							self.onCompletion(self.response);
							
							/*
							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 {
									self.elementObj.innerHTML = self.response;
								}
							}
							*/
							self.URLString = "";
						break;
					}
				};
			}
		}
	};
this.createAJAX();
}







function Trace(strMessage){
	var objTracer = document.getElementById("javascript_tracer");
	var objBuffer = null;
	var objTextArea = null;
	var objClear = null;
	var objClose = null;	
	var objDate = new Date();
	
	// Check to see if the tracer exists
	if (!objTracer){
		objTracer = document.createElement("div");
		
		objTracer.setAttribute("id", "javascript_tracer");
		objTracer.style.width = "300px";
		objTracer.style.backgroundColor = "#333333";
		objTracer.style.border = "1px solid #333333";
		objTracer.style.zIndex = 999999;
		objTracer.style.position = "absolute";
		objTracer.style.top = "10px";
		objTracer.style.left = "10px";
		objTracer.style.textAlign = "center";
		
		// Set up buffer
		objBuffer = document.createElement("div");
		objBuffer.style.border = "1px solid gold";
		objBuffer.style.padding = "2px 2px 2px 2px";
		
		// Attach buffer
		objTracer.appendChild(objBuffer);
		
		// Set up text area
		objTextArea = document.createElement("textarea");
		objTextArea.setAttribute("id", "javascript_tracer_text");
		objTextArea.style.display = "block";
		objTextArea.style.width = "295px";
		objTextArea.style.height = "250px";
		objTextArea.style.backgroundColor = "#333333";
		objTextArea.style.borderWidth = "0px 0px 0px 0px";
		objTextArea.style.color = "#FFFFFF";
		objTextArea.setAttribute("readonly", "readonly");
		
		// Attach textarea
		objBuffer.appendChild(objTextArea);
		
		// Create clear button
		objClear = document.createElement("button");
		objClear.style.width = "50%";
		//objClear.style.marginRight = "5px";
		objClear.appendChild(
			document.createTextNode("Clear")
			);
		objClear.onclick = function(){
			document.getElementById("javascript_tracer_text").value = "";
			}
		
		// Attach button
		objBuffer.appendChild(objClear);
		
		// Create close button
		objClose = document.createElement("button");
		objClose.style.width = "50%";
		objClose.appendChild(
			document.createTextNode("Close")
			);
		objClose.onclick = function(){
			document.getElementById("javascript_tracer").style.display = "none";
			}
		
		// Attach button
		objBuffer.appendChild(objClose);
		
		
		// Attach tracer
		document.getElementsByTagName("body").item(0).appendChild(objTracer);
	} 
	
	
	// Show tracer
	document.getElementById("javascript_tracer").style.display = "block";
	
	// Append message
	document.getElementById("javascript_tracer_text").value += (
		"[" + objDate.getHours() + ":" + 
		objDate.getMinutes() + ":" + 
		objDate.getSeconds() + "] : " + 
		strMessage + "\n"
		);

	// Scroll message
	document.getElementById("javascript_tracer_text").scrollTop = document.getElementById("javascript_tracer_text").scrollHeight;
}