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)
    {
        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")
                {
                    if (this.requestFile.indexOf('?') !=- 1) {
                        var totalurlstring = this.requestFile + "&" + this.URLString
                    }
                    else {
                        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:
                            try
                            {
                                self.response = self.xmlhttp.responseText;
                                self.responseXML = self.xmlhttp.responseXML;
                                self.responseStatus[0] = self.xmlhttp.status;
                                self.responseStatus[1] = self.xmlhttp.statusText
                            }
                            catch (e) {};
                            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 {
                                    self.elementObj.innerHTML = self.response;
                                }
                            };
                            self.URLString = "";
                            break
                    }
                }
            }
        }
    };
    this.createAJAX()
}