I see that it is still working on this page:
http://antronix.com/antronix-Products-All-ResAmps-results.php
It looks like you may have added a different version of the jquery library on the other pages which may be incompatible. You also seem to have multiple jquery includes on the same page. I'd try removing the repeated jquery references and just have the one from the working page and I imagine that will fix the problem.