[Deff]

<iframe src="source.html" name="MainFrame" height="100" width="100" frameborder="0" scrolling="no" Id="frame1"> </iframe>

 <script type="text/javascript">
 function refreshIFrame() {
 document.getElementByID('frame1').src="source.html?"+(+new Date());
 }
 setTimeout('refreshIFrame()',2000)
 </script>