Refreshing an (ebay) script?

I am using the eBay editor's kit to make a little ebay banner for my forums.
I want to place the "ad" in the forum's header, but this causes a problem.
Unlike Google Adsense ads, the eBay script will never refresh while a user surfs the forum (because its in the header).

Is there a way to have the script refresh itself automatically?

Here is the code:

<script language="JavaScript" src="http://lapi.ebay.com/ws/eBayISAPI.dll?EKServer&amp;ai=dpmsti%2b&amp;bdrcolor=CCCCCC&amp;bin=y&amp;catid=62053+4315&amp;cid=0&amp;eksize=4&amp;encode=ISO-8859-1&amp;endcolor=FF0000&amp;endtime=y&amp;fbgcolor=333333&amp;fntcolor=CCCCCC&amp;fs=0&amp;hdrcolor=81B939&amp;hdrimage=1&amp;hdrsrch=n&amp;img=n&amp;lnkcolor=FFB400&amp;logo=3&amp;maxprice=10&amp;num=25&amp;numbid=y&amp;paypal=n&amp;popup=y&amp;prvd=1&amp;r0=4&amp;sacategoryin=62053+4315&amp;shipcost=n&amp;sid=CAG1&amp;siteid=0&amp;sort=MetaEndSort&amp;sortby=endtime&amp;sortdir=asc&amp;srchdesc=n&amp;tbgcolor=333333&amp;tlecolor=CCCCCC&amp;tlefs=0&amp;tlfcolor=000000&amp;track=1312731&amp;watchcat=1249&amp;width=570"></script>

Code (markup):

 

The header of most forums still refresh with each page load, unless you use a frame, even then they still refresh.

The ads on this forum are in the header, and they refresh because the user views another page, not because google has anything to do with it.

Brandon