var target;

function loadPage(url, target_id) {
	target = document.getElementById(target_id);
	if (window.XMLHttpRequest) { // Non-IE browsers
		req = new XMLHttpRequest();
		req.onreadystatechange = targetDiv;
		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 = targetDiv;
			req.open("GET", url, true);
			req.send();
		}
	}
}
	
function targetDiv() {
	if (req.readyState == 4) { // Complete
		if (req.status == 200) { // OK response
			target.innerHTML = req.responseText;
		}
		else {
			alert("Problem: " + req.statusText);
		}
	}
}