[HTML] Resize iframe

<script language="javascript" type="text/javascript">
  function resizeIframe(obj) {
    obj.style.height = obj.contentWindow.document.body.scrollHeight + 'px';
  }
</script>

<iframe name="Stack" src="http://stackoverflow.com/" frameborder="0" scrolling="no" id="iframe" onload='javascript:resizeIframe(this);' />

Reference:
1.Make iframe automatically adjust height according to the contents without using scrollbar?