function initialize() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map_canvas"));
        var center = new GLatLng(51.2175604, 6.7658488);
        map.setCenter(center, 17);
      map.openInfoWindowHtml(map.getCenter(),"<div style=\"font-family: Verdana,Arial; font-size:12px;\"><b>Steffens Heimbau</b> <br>Wohnungsgesellschaft mbH<br>Neusser Str. 31<br>40219 D&uuml;sseldorf<br></div>");
		map.addControl(new GSmallMapControl());
        map.addControl(new GMapTypeControl());


        var marker = new GMarker(center, {draggable: true});

        GEvent.addListener(marker, "dragstart", function() {
          map.closeInfoWindow();
        });

        GEvent.addListener(marker, "dragend", function() {
          marker.openInfoWindowHtml("Just bouncing along...");
        });

        map.addOverlay(marker);

      }
    }