Not entirely sure if it is a

Renegade — Sun, 28 Nov 2010 21:50:51 +0000

Not entirely sure if it is a good idea to do what you are wanting as your users may get confused or even frustrated as to why they can't scroll. Also, I'm not sure if you mean an overlay like you see in the lightbox galleries or if you mean a div over your entire page.

If you mean the latter, you can achive the same effect with some jQuery:

<script>
$(document).mousemove(function (e) {
    $("#page-container").css("width",$(window).width());
    $("#page-container").css("height",$(window).height());
  });
</script>

Just set #page-container to whatever your div name is. What this will do is constantly poll the window's width and height as the user moves around your site. Not ideal solution but it does work.

Do you have an example of the effect you are trying to achive?