});
topMap.setZoom(10);
GMarkerOptions options = new GMarkerOptions("Home").draggable(true).autoPan(true);
topMap.addOverlay(new GMarker(new GLatLng(37.4, -122.1), options));
topMap.addControl(GControl.GLargeMapControl);
topMap.addControl(GControl.GMapTypeControl);
add(topMap);
final IModel<GMarker> markerModel = new Model<GMarker>(null);
markerLabel = new Label("markerLabel", markerModel);
markerLabel.add(new AjaxEventBehavior("onclick")