var http_request = false;
function ajax(url, fenster, infos) {
http_request = false;
ausgabe = fenster;
if (window.XMLHttpRequest) { // Mozilla, Safari,...
http_request = new XMLHttpRequest();
if (this.http_request.overrideMimeType) {
this.http_request.overrideMimeType('text/xml');
}
} else if (window.ActiveXObject) { // IE
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!http_request) {
alert('Kann keine XMLHTTP-Instanz erzeugen');
return false;
}
http_request.open('POST', url, true);
http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=ISO-8859-1');
http_request.onreadystatechange = aus;
http_request.send(infos);
}
function aus() {
   if (http_request.readyState == 4) {
      document.getElementById(ausgabe).innerHTML =
         http_request.responseText;
   }
}