public void update() { // CReate the event to fire GwtEvent<TabUpdateEvent.Handler> g = new GwtEvent<TabUpdateEvent.Handler>() { @Override public com.google.gwt.event.shared.GwtEvent.Type<Handler> getAssociatedType() { // TODO Auto-generated method stub return TabUpdateEvent.GetType(); } @Override protected void dispatch(Handler handler) { // TODO Auto-generated method stub handler.onUpdate(null); } }; // Fire a tabupdate event in the login/register loginSection.fireEvent(g); registerSection.fireEvent(g); }