function initialize() {
      if (GBrowserIsCompatible()) {

        var map = new GMap2(document.getElementById("amsterdamMap"));
        map.setCenter(new GLatLng(52.389245,4.890397), 17);
        var marker = new GMarker(new GLatLng(52.389245,4.890397));
  map.addOverlay(marker);
        map.setMapType(G_SATELLITE_MAP);
        map.setUIToDefault();

       var map2 = new GMap2(document.getElementById("berlinMap"));
        map2.setCenter(new GLatLng(52.52574548420819, 13.387033939361572), 17);
        var marker2 = new GMarker(new GLatLng(52.52574548420819, 13.387033939361572));
  map2.addOverlay(marker2);
        map2.setMapType(G_SATELLITE_MAP);
        map2.setUIToDefault();

        var map3 = new GMap2(document.getElementById("stuttgartMap"));
        map3.setCenter(new GLatLng(48.77384022271721,9.168949127197266), 17);

        var marker3 = new GMarker(new GLatLng(48.77384022271721,9.168949127197266));
        map3.addOverlay(marker3);
        map3.setMapType(G_SATELLITE_MAP);
        map3.setUIToDefault();

      }
}

// starte script nach dem page geladen wurde
window.addEvent('domready', function(){

 // create gMaps
 initialize( );

 // create Slideshow
 var obj = {
  color: '#E50050',
  width: '632',
  height: '371',
  thumbnails: false
 }

 var mySlideShow = new espiSlideshow( "amsterdamPictures", obj );
 var mySlideShow2 = new espiSlideshow( "berlinPictures", obj );

 $('amsterdamPictures').setStyle("display", "none");
 $('berlinPictures').setStyle("display", "none");

 $('viewAmsterdamMap').getElement('a').set('href', 'javascript:;');
 $('viewAmsterdamPictures').getElement('a').set('href', 'javascript:;');

 $('viewBerlinMap').getElement('a').set('href', 'javascript:;');
 $('viewBerlinPictures').getElement('a').set('href', 'javascript:;');


 $('viewAmsterdamMap').addEvent('click', function(){
  $('amsterdamMap').setStyle("display", "block");
  $('amsterdamPictures').setStyle("display", "none");
  $('viewAmsterdamPictures').removeClass("current");
  $('viewAmsterdamMap').addClass("current");
 });


 $('viewAmsterdamPictures').addEvent('click', function(){
  $('amsterdamPictures').setStyle("display", "block");
  $('amsterdamMap').setStyle("display", "none");
  $('viewAmsterdamMap').removeClass("current");
  $('viewAmsterdamPictures').addClass("current");
 });

 $('viewBerlinMap').addEvent('click', function(){
  $('berlinMap').setStyle("display", "block");
  $('berlinPictures').setStyle("display", "none");
  $('viewBerlinPictures').removeClass("current");
  $('viewBerlinMap').addClass("current");
 });

 $('viewBerlinPictures').addEvent('click', function(){
  $('berlinPictures').setStyle("display", "block");
  $('berlinMap').setStyle("display", "none");
  $('viewBerlinMap').removeClass("current");
  $('viewBerlinPictures').addClass("current");
 });



});