<html><body>
<div id="scrollable" style="overflow-y:scroll;height:500px">
<div style="height:1000px;width:500px;">
Scrollable content.
</div>
</div>
<script type="text/javascript">
document.getElementById('scrollable').addEventListener('mousedown',
function(evt) {
evt.preventDefault();
});
</script></body></html>