function alertContents(http_request, todo) {
	try {
		if (http_request.readyState == 4) {
			if (http_request.status == 200) {
				var xmldoc = http_request.responseXML;
				todo(xmldoc);
			} else {
			}
		}
	} catch( e ) {
		alert('ERROR: Caught Exception: ' + e.description);
	}
}

function makeRequest(url, whendone) {
	var http_request = false;
	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	} else if (window.ActiveXObject) {
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}

	if (!http_request) {
		alert('ERROR: Cannot create an XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange = function() { alertContents(http_request, whendone); };
	http_request.open('GET', url, true);
	http_request.send(null);
}

function emptyfunction(xmldoc) {
};