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:
                            //alert(self.xmlhttp.responseText);
                            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.responseStatus[0] == "200") {
                                self.onCompletion();
                            } else {
                                self.onError();
                            }

                            self.URLString = "";
                            break;
                    }
                };
                this.xmlhttp.send(this.URLString);
            }
        }
    };

    this.reset();
    this.createAJAX();
}

<!-- AJAX Function -->
    function ajaxMultiLayerObject(layer, url) {
        var that=this;
        var updating = false;
        this.callback = function() {}

        this.update = function(passData){
            if (updating==true) { return false; }
                updating=true;
                var AJAX = null;
            if (window.XMLHttpRequest){
                AJAX=new XMLHttpRequest();
            }else{
                AJAX=new ActiveXObject("Microsoft.XMLHTTP");
            }
            if (AJAX==null){
                alert("Your browser doesn't support AJAX.");
                return false
            }else{
                AJAX.onreadystatechange = function(){
            if (AJAX.readyState==4 || AJAX.readyState=="complete"){
                LayerID.innerHTML=AJAX.responseText;
               delete AJAX;
               updating=false;
               that.callback();
            }
         }
         var timestamp = new Date();
         var uri=urlCall+'?'+passData+'&timestamp='+(timestamp*1)+'&rnd='+Math.random();
         AJAX.open("GET", uri, true);
         AJAX.send(null);
         return true;
      }
   }
    var LayerID = document.getElementById(layer);
    var urlCall = url;
}

/* START - AJAX COMMON FUNCTIONS */
function update(result, ui_id){

    var div = $(ui_id);
    if (result.status==Http.Status.OK){

        div.innerHTML = result.responseText;

    }else{
        
        div.innerHTML = "";
    }   
}// end update()



function update2(result, ui_id){
    var div = $(ui_id);
    if (result.status==Http.Status.OK){

        document.getElementById(ui_id).innerHTML = result.responseText;

    }else{
        
        div.innerHTML = "";
    }   
}// end update()


var Base64 = {

    // private property
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    // public method for encoding
    encode : function (input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;

        input = Base64._utf8_encode(input);

        while (i < input.length) {

            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output +
            this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
            this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }

        return output;
    },

    // public method for decoding
    decode : function (input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = this._keyStr.indexOf(input.charAt(i++));
            enc2 = this._keyStr.indexOf(input.charAt(i++));
            enc3 = this._keyStr.indexOf(input.charAt(i++));
            enc4 = this._keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

    // private method for UTF-8 encoding
    _utf8_encode : function (string) {
        string = string.replace(/\r\n/g,"\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    },

    // private method for UTF-8 decoding
    _utf8_decode : function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while ( i < utftext.length ) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i+1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i+1);
                c3 = utftext.charCodeAt(i+2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }

}


function countryCode(cache_method, ui_id, tag){
    var div = $(ui_id);
    document.getElementById(ui_id).innerHTML ="<div style='clear:both; overflow:auto; font-family:Arial; font-size:12px;color:#996600; text-align:left;'><img src='/images/ajax-loader.gif' /> &nbsp;&nbsp;  Please wait...</div>";
    var url="/ajax/list_countries.php?country_letter="+Base64.encode(tag);
    //alert(url);
    //return false;
    Http.get({
        url: "/ajax/list_countries.php?country_letter="+Base64.encode(tag),
        callback: update2,
        cache: cache_method 
    }, [ui_id]);
        
}


function changeSearchType(cache_method, ui_id, tag){
    document.getElementById('searchby').style.display='block';
    var div = $(ui_id);
    var acountry=document.getElementById('acountry').value;
    var country=document.getElementById('country').value;
    var fieldValue= document.getElementById('fld').value;
    if(country==""){
        alert('Please first select country name');
        return false;
    }else{      
        document.getElementById(ui_id).innerHTML ="<div style='clear:both; overflow:auto; font-family:Arial; font-size:12px; font-weight:bold;color:#996600; text-align:left;'><img src='/images/ajax-loader.gif' /><br> &nbsp;&nbsp;&nbsp; Searching ... Please wait</div>";
        
        Http.get({
            url: "/ajax/list_countries.php?acountry="+acountry+"&country="+country+"&fld="+fieldValue,
            callback: update2
            //cache: cache_method   
        }, [ui_id]);
    }
    
}