I had this problem a while ago and tried the method you mentioned but could achieve any success. In the end the way I got round this was using PHP to place a number on the end of the url like so ... Generate a number <? $randid = "time()"; ?> Call the image like so... <? echo "<img src=../images/$picture_name?$randid>"; ?> Hope that helps Marc ----- Original Message ----- From: Warden, Matt <mwarden at mattwarden.com> > > Does anyone have a resource that lists possible headers in HTTP? Specifically, > I'm looking for the ones that would stop caching... in other words, have an > image re-downloaded every time. This is because the image is dynamically > generated and I don't want the same one popping up every time.