<html><head><script type="text/javascript">function addScrollbars() { document.getElementById("frame1").scrolling="yes"; }function removeScrollbars() { document.getElementById("frame1").scrolling="no"; }</script></head><body><iframe src="/example/hdom/frame_a.html" id="frame1" ></iframe><br /><input type="button" onclick="addScrollbars()" value="Add Scrollbars" /><input type="button" onclick="removeScrollbars()" value="Remove Scrollbars" /></body></html>