browserNavigation = RWT.getClient().getService(BrowserNavigation.class);
if (browserNavigation != null)
browserNavigation.addBrowserNavigationListener(new BrowserNavigationListener() {
browserNavigation = RWT.getClient().getService(BrowserNavigation.class);
if (browserNavigation != null)
browserNavigation.addBrowserNavigationListener(new BrowserNavigationListener() {