var req			= null;
var which		= null;
var element		= null;
var reqHTML		= "";

function retrieveXMLfromURL(url) {
	if (window.XMLHttpRequest) { // Non-IE browsers
		req = new XMLHttpRequest();
		req.onreadystatechange = processStateChange;
		try {
			req.open("GET", url, false);
		} catch (e) {
			alert("Unable to load. This may be due to your browser security settings, or your browser cache may be full. ");
		}
		req.send(null);
	} else if (window.ActiveXObject) { // IE
		req = new ActiveXObject("Microsoft.XMLHTTP");
		if (req) {
			req.onreadystatechange = processStateChange;
			req.open("GET", url, false);
			req.send();
		}
	}
} 

function processStateChange() {
	if (req.readyState == 4) { // Complete
		if (req.status == 200) { // OK response
			reqHTML=req.responseText.toString();	
		} 
		else {
			reqHTML.empty();
		}
	}
}