[rowe]

im just making this on the fly, but i think the code would be:

<script type="text/javascript">
<!--
var pages = new Array('url1','url2',...,'urlN');
function loadRandomPage(){
  var newPage = pages[Math.floor(Math.random()*pages.length)]
  window.location=newPage;
}
//-->
</script>
<input type="button" onclick="loadRandomPage()" value="Change URL">

Let me know if that works.