var http_request = false;

        function macheRequest(url) {

            http_request = false;

            if (window.XMLHttpRequest) { // Mozilla, Safari,...
                http_request = new XMLHttpRequest();
                if (http_request.overrideMimeType) {
                    http_request.overrideMimeType("text/xml");
                    // zu dieser Zeile siehe weiter unten
                }
            } 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("Ende :( Kann keine XMLHTTP-Instanz erzeugen");
                return false;
            }
            http_request.onreadystatechange = alertajax_right;
            http_request.open("GET", "functions/" + url, true);
            http_request.send(null);

        }

        function alertajax_right() {
            if (http_request.readyState == 4) {
                 var answer = http_request.responseText;
                   //var answer = http_request.responseText;
                   if(document.getElementById("ajax_right").innerHTML != answer){
                    document.getElementById("ajax_right").innerHTML = answer;
                  }
                  else{
                    document.getElementById("ajax_right").innerHTML = "";
                  }
            }

        }
    function hdl_popup(URL)
    {
        var Name = "popup";
        var Fensteroptionen = "toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0";
        var Breite = 400;
        var Hoehe = 500;
        window.open("functions/" + URL, "Name", Fensteroptionen + ",width=" + Breite + ",height=" + Hoehe);
    }