توجه:برای تست کدها به اینجا بروید.
<html>
<head>
<script language="javascript" type="text/javascript">
alert("Welcome to my site")
</script>
</head>
<body>
<h1>
<!-- hide script from old browsers -->
<!--this is on example of a long JavaScript comment-->
<script language="javascript" type="text/javascript">
document.write("KKR")
//end hiding script from old browsers -->
</script>
</h1>
</body>
</html>