var req;
var which;
var m= "";

function retrieveurl(url) {
	//startLoading();
	if (window.XMLHttpRequest) { // Non-IE browsers
		req = new XMLHttpRequest();
		req.onreadystatechange = processStateChange;
		try {
			req.open("GET", url, true);
		} catch (e) {
			alert(e);
		}
		req.send(null);
	} else if (window.ActiveXObject) { // IE
		req = new ActiveXObject("Microsoft.XMLHTTP");
			if (req) {
				req.onreadystatechange = processStateChange;
				req.open("GET", url, true);
				req.send();
			}
		}
}
function processStateChange() {
	if (req.readyState == 4) { // Complete
		if (req.status == 200) { // OK response
			m=req.responseText;			
		//	stopLoading();
			//alert(m);
			//doSomething(m);
		} else {
			alert("Problem: " + req.statusText);
		}
		if(req.readyState==1){
			alert('the request has been set up');
		}
		if(req.readyState==2){
			alert('the request has been sent');
		}
		if(req.readyState==3){
			alert('the request is in process');
		}
	}
}