public void buildToolbar(){
		final JMenuBar menubar = new JMenuBar();
		JMenu display_menu = new JMenu("Display Options");
		
		final JCheckBoxMenuItem view = new JCheckBoxMenuItem("Show Critter views");
		view.addActionListener(new ActionListener(){
			@Override
			public void actionPerformed(ActionEvent arg0) {
				if(view.isSelected()){
					planet.display_views = true;
					view.setText("Hide Critter views");
				}
				else{
					planet.display_views = false;
					view.setText("Show Critter views");
				}					
			}
			
		});
		display_menu.add(view);
		
		final JCheckBoxMenuItem sprites = new JCheckBoxMenuItem("Show detailed Critters");
		sprites.addActionListener(new ActionListener(){
			@Override
			public void actionPerformed(ActionEvent arg0) {
				if(sprites.isSelected()){
					sprites.setText("Show simple Critters");
					planet.paint_detailed = true;
					
				}
				else{
					sprites.setText("Show detailed Critters");
					planet.paint_detailed = false;
					CritterUtil.massApplySimpleSprite(planet);
					
				}					
			}
			
		});
		display_menu.add(sprites);
		
		menubar.add(display_menu);
		
		
		setJMenuBar(menubar);
	}