var xmlHttp = false;
try {
	xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
	try {
		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	} catch (e2) {
		xmlHttp = false;
	}
}
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
	xmlHttp = new XMLHttpRequest();
}

function Login(Url) {
	xmlHttp.open("POST", Url, false);
	xmlHttp.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
	try {
		xmlHttp.send("");
		if(xmlHttp.readyState==4) return xmlHttp.responseText;
		else return null;
	} catch(E) {
		alert("Server busy");
	}
}