{
final GMap map = new GMap("topPanel");
add(map);
final WebMarkupContainer zoomIn = new WebMarkupContainer("zoomIn");
zoomIn.add(map.new ZoomInBehavior("onclick"));
add(zoomIn);
final WebMarkupContainer zoomOut = new WebMarkupContainer("zoomOut");
zoomOut.add(map.new ZoomOutBehavior("onclick"));
add(zoomOut);