/* 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;
        var indexStart = self.response.indexOf("DMI:AJAX:BEGIN");
        var indexEnd = self.response.indexOf("DMI:AJAX:END");
        var length = indexEnd-indexStart+1;
        self.response = self.response.substr(indexStart+14, length-15);
        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();
        }