<shrug>I can't help it if you are using something that is less than ideal for your situation.
But I *think* that if you used what I suggested, it would probably work even with that code. Just be sure to *NOT* use their zoom code.
By the by, I think I could replicate all the functionality of that code that you are actually using in about half the number of lines. Just by avoiding jQuery. (Well, there's very little in there that actually depend on jQuery, for that matter.)