Writing HTML Based on screen.width

[imported_silkroad]

Anyone know why this simple javascript does not work?

<script type="text/javascript">
<!--
if (screen.width > 500) {
document.write('<td><img src="$vbphrase[image_bucket]/images/space.jpg"></td>');
document.write('<td><img height="280px" src="$vbphrase[image_bucket_/images/logo.jpg"></td>');
}
//-->
</script>

The purpose is to simply check the screen.width using js and if greater than 500 write some additional HTML.

Thanks.

--------------- Added [DATE]1253591522[/DATE] at [TIME]1253591522[/TIME] ---------------

Nevermind... it's working...