function sendRequest(url,id,callback,postData) {
window.req = createXMLHTTPObject();
if (!req) return;
//var method = (postData) ? "POST" : "GET";
var method = 'GET';
req.open(method,url,true);
//
if (req.overrideMimeType) {req.overrideMimeType('text/xml');}
req.setRequestHeader('User-Agent','XMLHTTP/1.0');
if (postData) req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
req.onreadystatechange = function () {
if (req.readyState != 4) {return;}
if (req.status != 200 && req.status != 304) {return;}
callback(req,id);
}
if (req.readyState == 4) return;
req.send(postData);
}

var XMLHttpFactories = [
function () {return new XMLHttpRequest()},
function () {return new ActiveXObject("Msxml2.XMLHTTP")},
function () {return new ActiveXObject("Msxml3.XMLHTTP")},
function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
var xmlhttp = null;
for (var i=0;i<XMLHttpFactories.length;i++) {
try {
xmlhttp = XMLHttpFactories[i]();
}
catch (e) {
continue;
}
break;
}
return xmlhttp;
}