Javascript setInterval on a frameset

I have a frameset page that I would like to run the javascript function setInterval.

window.setInterval("reload('')", 5000);
function reload(url) {

But It doesn't work as I expect, nothing happens.  I've attached the whole page in case my problem is not limited to just the javascript, but somewhere else in the html.
What did I miss or do wrong?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<html xmlns="">
<title>Testing Frame reload</title>
<script type="text/javascript">
// <![CDATA[
window.setInterval("reload('')", 5000);
function reload(url) {
// ]]>
<FRAMESET cols="*, 165">
  <FRAMESET rows="120, *">
      <FRAME frameborder="0" marginwidth="5" marginheight="5" border="0" src="header.html" name="main" />
      <FRAME frameborder="0" marginwidth="5" marginheight="5" border="0" src="forum.php" name="forum" />
  <frame frameborder="0" scrolling="no" noresize  marginwidth="7" marginheight="0" src="session.php" name="session" />

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Since the source page is not refreshing, the frame will not refresh either -- i.e. nothing happens.  

In the frame page, simply put this in the HEAD of the document --

<meta http-equiv="Refresh" content="5000; url=myFramesetPage.html">

That will reload the frame page in the frame every 5000 seconds.

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dban00bAuthor Commented:
Yup the problem was I can't do this from the frameset page, it has to be done from within the frame.
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