/* Simple AJAX Code-Kit (SACK) v1.6.1 */



/* ?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.xmlhttp = null;







	this.resetData = function() {



		this.method = "POST";



  		this.queryStringSeparator = "?";



		this.argumentSeparator = "&";



		this.URLString = "";



		this.encodeURIString = true;



  		this.execute = false;



  		this.element = null;



		this.elementObj = null;



		this.requestFile = file;



		this.vars = new Object();



		this.responseStatus = new Array(2);



  	};







	this.resetFunctions = function() {



  		this.onLoading = function() { };



  		this.onLoaded = function() { };



  		this.onInteractive = function() { };



  		this.onCompletion = function() { };



  		this.onError = function() { };



		this.onFail = function() { };



	};







	this.reset = function() {



		this.resetFunctions();



		this.resetData();



	};







	this.createAJAX = function() {



		try {



			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");



		} catch (e1) {



			try {



				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");



			} catch (e2) {



				this.xmlhttp = null;



			}



		}







		if (! this.xmlhttp) {



			if (typeof XMLHttpRequest != "undefined") {



				this.xmlhttp = new XMLHttpRequest();



			} else {



				this.failed = true;



			}



		}



	};







	this.setVar = function(name, value){



		this.vars[name] = Array(value, false);



	};







	this.encVar = function(name, value, returnvars) {



		if (true == returnvars) {



			return Array(encodeURIComponent(name), encodeURIComponent(value));



		} else {



			this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);



		}



	}







	this.processURLString = function(string, encode) {



		encoded = encodeURIComponent(this.argumentSeparator);



		regexp = new RegExp(this.argumentSeparator + "|" + encoded);



		varArray = string.split(regexp);



		for (i = 0; i < varArray.length; i++){



			urlVars = varArray[i].split("=");



			if (true == encode){



				this.encVar(urlVars[0], urlVars[1]);



			} else {



				this.setVar(urlVars[0], urlVars[1]);



			}



		}



	}







	this.createURLString = function(urlstring) {



		if (this.encodeURIString && this.URLString.length) {



			this.processURLString(this.URLString, true);



		}







		if (urlstring) {



			if (this.URLString.length) {



				this.URLString += this.argumentSeparator + urlstring;



			} else {



				this.URLString = urlstring;



			}



		}







		// prevents caching of URLString



		this.setVar("rndval", new Date().getTime());







		urlstringtemp = new Array();



		for (key in this.vars) {



			if (false == this.vars[key][1] && true == this.encodeURIString) {



				encoded = this.encVar(key, this.vars[key][0], true);



				delete this.vars[key];



				this.vars[encoded[0]] = Array(encoded[1], true);



				key = encoded[0];



			}







			urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];



		}



		if (urlstring){



			this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);



		} else {



			this.URLString += urlstringtemp.join(this.argumentSeparator);



		}



	}







	this.runResponse = function() {



		eval(this.response);



	}







	this.runAJAX = function(urlstring) {



		if (this.failed) {



			this.onFail();



		} else {



			this.createURLString(urlstring);



			if (this.element) {



				this.elementObj = document.getElementById(this.element);



			}



			if (this.xmlhttp) {



				var self = this;



				if (this.method == "GET") {



					totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;



					this.xmlhttp.open(this.method, totalurlstring, true);



				} else {



					this.xmlhttp.open(this.method, this.requestFile, true);



					try {



						this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")



					} catch (e) { }



				}







				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;







							if (self.execute) {



								self.runResponse();



							}







							if (self.elementObj) {



								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;



								}



							}



							if (self.responseStatus[0] == "200") {



								self.onCompletion();



							} else {



								self.onError();



							}







							self.URLString = "";



							break;



					}



				};







				this.xmlhttp.send(this.URLString);



			}



		}



	};







	this.reset();



	this.createAJAX();



}