Use an iframe if you only need to support Internet Explorer and the 6+ browsers. Netscape 4 doesn't support it. I don't know why you'd use a div (if you want it dynamic, if it's static, you'll want to use div). If you want it to display 2 random questions to make things more interesting, I'd recommend linking to an external javascript file (in the head):
<script src="question.js"></script>
and in the js file, make sure all the document.writes are in a div aligned up there (or a <p> would work, too).
Rick