function createXMLHttpRequestObject() {
	var resObject = null;

	try {
		resObject = new ActiveXObject('Microsoft.XMLHTTP');
	}

	catch(Error) {
		try {
			resObject = new ActiveXObject('MSXML2.XMLHTTP');
		}

		catch(Error) {
			try {
				resObject = new XMLHttpRequest();
			}

			catch(Error) {
				alert('Erzeugung des XMLHttpRequest-Objekts nicht möglich!');
			}
		}
	}

	return resObject;
}

function sendRequest(eventCategoryID) {
	resObject.open('get', 'index.php?page=highlights&eventCategoryID='+eventCategoryID, TRUE);
	resObject.onreadystatechange = handleResponse;
	resObject.send(null);
}

function handleResponse() {
	if(resObject.readyState === 4) {
		document.getElementById('eventCategoryID').innerHTML = resObject.responseText;
	}
}