Mirrored JavaScript Doesn't Work - Works On One Not On The Other

So I'm having a little bit of a problem.. I have two sites that are exactly the same as far as the files and code go. Theres also a javascript function for showing hidden images. Well, its working on one of the sites and the other one isn't even calling the function. Any idea what could be wrong? Like I said the code is exactly the same.. I've even tried copying the site that works in its entirety to the other domain and it won't work.

What gives? Anyone had something similar happen?

check catalog tree...
maybe this is the problem