THE WWT: WEB WIDGETS TOOLKIT

var display = new Display();
var shell = new Shell(display);

/** Hello world */
var helloWorldShell = new Shell(shell, WWT.TITLE |WWT.RESIZE | WWT.CLOSE);
helloWorldShell.setText("Hello world");
helloWorldShell.setLocation(700, 0);
helloWorldShell.setSize(200, 200);
helloWorldShell.setColor(new Color(5, 5, 5));
var helloWorldButton = new Button(helloWorldShell, WWT.RIGHT);
helloWorldButton.setLocation(52, 13);
helloWorldButton.setSize(85, 40);
helloWorldButton.setText("Hello world !");
var helloWorldButtonListener = new SelectionListener();
var tt = new ToolTip(helloWorldShell, WWT.BALLOON);
tt.setText("Bonjour");
tt.setLocation(5, 65);

var tt2 = new ToolTip(helloWorldShell, WWT.NONE);
tt2.setText("Aurevoir");
tt2.setLocation(115, 65);
helloWorldButtonListener.widgetSelected = function(){
		if(!tt.getVisible()){
			tt.setVisible(true);
			tt2.setVisible(true);
			if(tt.getMessage() == "Bonjour")
				tt.setMessage("Bonjour à tous");
			else
				tt.setMessage("Bonjour");
		}else{
			tt.setVisible(false);
			tt2.setVisible(false);
		 }
	};
helloWorldButton.addSelectionListener(helloWorldButtonListener);
helloWorldShell.open();