@FXML 
  protected void helpApplication(ActionEvent event) {
	  Stage dialog = new Stage();
	  dialog.initStyle(StageStyle.UTILITY);
	  Scene scene = new Scene(new Group(new Text(25, 25, "Hello World!")));
	  dialog.setHeight(200);
	  dialog.setWidth(400);
	  dialog.setScene(scene);
	  dialog.show();
  }