function sendXMLRequest(url, responseXMLHandler) {
	if (window.XMLHttpRequest) {
		req = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		req = new ActiveXObject("Microsoft.XMLHTTP");
	}
	var handlerFunction = getReadyStateHandler(req, responseXMLHandler);
	req.onreadystatechange = handlerFunction;
	req.open("GET", url, true);
	req.send(null);
}

function getReadyStateHandler(req, responseXMLHandler) {
	return function () {
		if (req.readyState == 4) {
			if (req.status == 200) {
				responseXMLHandler(req.responseXML, req);
			} else {
				alert('Data synchronisation transfer error');
			}
		}
	}
}