function initialize() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map_canvas"));
        map.setCenter(new GLatLng(49.5627355556, 15.9392405556), 7);
        map.setUIToDefault();
        
        // Create a base icon for all of our markers that specifies the
        // shadow, icon dimensions, etc.
        var baseIcon = new GIcon(G_DEFAULT_ICON);
        baseIcon.shadow = "http://www.fscifra.cz/img/shadow-zarovka.png";
        baseIcon.iconSize = new GSize(32, 37);
        baseIcon.shadowSize = new GSize(55, 46);
        baseIcon.iconAnchor = new GPoint(16, 36);
        baseIcon.infoWindowAnchor = new GPoint(16, 37);
 
        // Creates a marker whose info window displays the letter corresponding
        // to the given index.
        function createMarker(point, index, letter) {
          // Create a lettered icon for this point using our icon class
          var letteredIcon = new GIcon(baseIcon);
          letteredIcon.image = "http://www.fscifra.cz/img/zarovka.png";
 
          // Set up our GMarkerOptions object
          markerOptions = { icon:letteredIcon };
          var marker = new GMarker(point, markerOptions);
          return marker;
        }
 
		    var lat = "49.0676452778";
        var lng = "17.4601841667";
        var latlng = new GLatLng(lat, lng);
        map.addOverlay(createMarker(latlng, 0));
        }
      }