var request = false;
try {
	request = new XMLHttpRequest();
} catch (trymicrosoft) {
	try {
		request = new ActiveXObject("Msxml2.XMLHTTP");
	} catch (othermicrosoft) {
		try {
			request = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (failed) {
			request = false
		}  
	}
}
if (!request) alert("Error initializing XMLHttpRequest!");
function connectByURL(url) {
	request.open("GET", url, true);
	request.onreadystatechange = getResponse;
	request.send(null);
}