The problematic page has this url:

http://geosci.uchicago.edu/~moyer/Mo...GroupPage.html

It shows up in firefox the way I want it to. The pictures enlarge right on top of their thumbnail accompaniments. The enlarged images are absolutely positioned. However, in chrome, internet explorer and safari, they enlarge several hundred pixels left of where I want them to. Is there a way I can have the enlarged images positioned relative to the thumbnails? Or can I add a margin to the code that only firefox will recognize?
I can send you the code if you need it to figure out the problem. It is just long and confusing, because I was modifying somebody else's code and I am a newbie.