Javascript
From ThaiiS Note (Wiki)
document.write
<html>
<body>
<script type="text/javascript">
document.write("test");
</script>
</body>
</html>
Browsers that do not support JavaScript
<html>
<body>
<script type="text/javascript">
<!--
document.write("Hello World!");
//-->
</script>
</body>
</html>
full : http://www.w3schools.com/js/