infoWindow with tabs error in

[kentuky]

Hello,
i use the following Script  to read Markers and place it with an
infowindow with tabs.
I get an Error : "a is undefined in ...maps.gstatic.com/intl/de_ALL/
mapfiles/250a/maps2.api/main.js Row 706.

Can anyone give me a solution of that ?
You can see the Webside on
http://www.pgschmitz.de/index.php?id=164&no_cache=1

Thank you


    function initialize() {
     if (GBrowserIsCompatible()) {
      var i = 0;
     //Icon Definition
      var cicon = new GIcon();
          cicon.iconSize=new GSize(22,22);
          cicon.iconAnchor=new GPoint(11,11);
          cicon.infoWindowAnchor=new GPoint(11,11);
           // Icon Array
      var gicons = [];
      gicons["grosso"] = new GIcon(cicon, "fileadmin/schmitz/template/
images/grosso.png");
      gicons["fach"] = new GIcon(cicon, "fileadmin/schmitz/template/
images/fach.png");
      gicons["blau"] = new GIcon(cicon, "fileadmin/schmitz/template/
images/blau.png");

     // Start: Funktion zum erstellen des Markers und Eventwindows
  function createMarker(point,name,icon,tab1,tab2) {
        // Erstellen des Markers mit dem entsprechenden Icon
        var marker = new GMarker(point, gicons[icon]);
        var tabs = [];
                                var content1;
                                var content2;

        GEvent.addListener(marker, "click", function() {
                  GDownloadUrl(tab1, function(html,responseCode) {
            content1 = html;}
                                                        );
        GDownloadUrl(tab2, function(html,responseCode) {
            content2 = html;}
                                                );
          marker.openInfoWindowTabsHtml([new GInfoWindowTab('Uebersicht',
'test'), new GInfoWindowTab('Oeffnungszeiten', 'test2')]);
          //[new GInfoWindowTab('Uebersicht', content1), new
GInfoWindowTab('Oeffnungszeiten', content2)])

        return marker;
      })};
     // Ende: Funktion zum erstelln des Markers und Eventwindows

     // Start: Erstellen der Karte
          var map = new GMap2(document.getElementById("kd_map"));
          // Festlegen des Center-Punktes
          map.setCenter(new GLatLng(51.50167,7.091954), 9);
          // Kartennavigation
          map.addControl(new GLargeMapControl());
          //Kartentypen
          map.addControl(new GMapTypeControl());
         }
     // Ende: Erstellen der Karte

  // Start: Auslesen der Daten aus der Datei data.xml
   GDownloadUrl("fileadmin/schmitz/template/marker/data.xml",
function(data, responseCode) {
  var xml = GXml.parse(data);
  var markers = xml.documentElement.getElementsByTagName("marker");
  for (var i = 0; i < markers.length; i++)
  {
    var point = new
GLatLng(parseFloat(markers[i].getAttribute("lat")),
 
parseFloat(markers[i].getAttribute("lng")));
      var label = markers[i].getAttribute("kdname");
            // Auslesen der Icontype-Information
      var icon = markers[i].getAttribute("icon");
      var tab1 = "fileadmin/schmitz/template/marker/";
                tab1 += markers[i].getAttribute("tab1");
                        var tab2 = "fileadmin/schmitz/template/marker/";
          tab2 += markers[i].getAttribute("tab2");

                        //Erzeugen des Markers mit Icontype als Bild
      var marker = createMarker(point,label,icon,tab1,tab2);
            map.addOverlay(marker);
  }
});
}

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