Mine

<html>
<head>
<title>Perso</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link href="css/customMsgBox.css" rel="stylesheet" media="all" type="text/css" />
<script type="text/javascript" src="js/prototype/prototype2.js"></script>
<script type="text/javascript" src="js/scriptaculous/scriptaculous.js"></script>
<script type="text/javascript" src="js/customMsgBox.js"></script>
</head>
<body>
	<input type="button" value="Test" onclick="alert('<b>Salut !</b><br/><br/>Ceci est une bote de dialogue personnalise :)')" />
	
	<script type="text/javascript">
		Event.observe(window, 'load', initMsgBox, false);
	</script>
</div>
</body>
</html>