function query() {
	try {
		var req = null;
		try {
			req = new XMLHttpRequest();
		}
		catch(ms) {
			try {
				req = new ActiveXObject("Msxml2.XMLHTTP");
			} 
			catch (nonms) {
				try {
					req = new ActiveXObject("Microsoft.XMLHTTP");
				} 
				catch (failed) {
					req = null;
				}
			}  
		}

		if (req == null) alert("Error creating request object!");
   
		req.open("GET", 'query.php', true);

		req.onreadystatechange = function() {            
			switch(req.readyState) {
				case 4:
					if(req.status != 200) {
						alert("Fehler:" + req.status); 
					} else {    
						var script = document.createElement('script');
						script.type = 'text/javascript';
						script.text = unescape(req.responseText);
						document.body.appendChild(script);
					}
					break;
				default:
					return false;
					break;     
			}
		};

		req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		req.send(null);
	} catch(err) {
		alert("Error: " + err);
	}
}