function DoCallback(data)

{	

	//alert(data);
	
	// branch for native XMLHttpRequest object

	if (window.XMLHttpRequest) {

		//alert('1'+data);

		req = new XMLHttpRequest();

		req.onreadystatechange = processReqChange;

		req.open('POST', url, true);

		req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

		req.send(data);

	// branch for IE/Windows ActiveX version

	}
	else if (window.ActiveXObject) {		

		req = new ActiveXObject('Microsoft.XMLHTTP');

		if (req) {

			//alert('2'+data);

			req.onreadystatechange = processReqChange;

			req.open('POST', url, true);

			req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

			req.send(data);

		}

	}

}
function processReqChange() {

	// only if req shows 'loaded'

	if (req.readyState == 4) {

		// only if 'OK'

		if (req.status == 200) {

			//alert(req.responseText);

			eval(what);

			//return LoginStatus(req.responseText);

		} else {

			alert('There was a problem retrieving the XML data:\n' +

				req.responseText);

		}

	}

}