function callAHAH(url, pageElement, callMessage, errorMessage) {
	document.getElementById(pageElement).innerHTML = '<img src="http://demo.rottochop.nl/inc/img/icons/wait.gif" />';
	try {
		req = new XMLHttpRequest();
		/* e.g. Firefox */
	} catch(e) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP");
			/* some versions IE */
		} catch (e) {
			try {
				req = new ActiveXObject("Microsoft.XMLHTTP");
				/* some versions IE */
			} catch (E) {
				req = false;
			}
		}
	}

	req.onreadystatechange = function() {
		responseAHAH(pageElement, errorMessage);
	};
	req.open("GET",url,true);
	req.send(null);
}
function responseAHAH(pageElement, errorMessage) {
	if(req.readyState == 4) {
		if(req.status == 200) {
			output = req.responseText;
			document.getElementById(pageElement).innerHTML = output;
		} else {
			document.getElementById(pageElement).innerHTML = errorMessage+"\n"+responseText;
		}
	}
}