var xmlHttp = null;
	// Mozilla, Opera, Safari sowie Internet Explorer 7
	if(typeof XMLHttpRequest != 'undefined') {
		xmlHttp = new XMLHttpRequest();
	}
	else {
		// Internet Explorer 6 und älter
		try {
			xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(e) {
			try {
				xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(e) {
				xmlHttp = null;
			}
		}
	}