var req = null;
function CreateRequest() {
	try {
		req = new XMLHttpRequest();
	}
	catch (tryMicrosoft) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (otherMicrosoft) {
			try {
				req = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (failed) {
				req = null;
			}
		}
	}
	if (req == null) {
		alert("Error While creating request object !!! ");
		return false;
	}

}