If you would like an example of how to code a CSS tooltip, let me know. You can put images in them.
*edit I took a look at the Zorn JS… omigawd. That’s a LOT of code just for a wee lil’ tooltip.
Best thing to do maybe is load both your copy of the JS and his copy in a program like vi that can show diffs (whatever’s different between the two) to make sure some error wasn’t made in copying over.
Next thing would be to check your page versus his… whatever elements are getting the tooltips may need exactly the same names.
If you comment out your <links> to the CSS files, does it work (this makes sure CSS isn’t somehow interfering).
If you comment out all your other scripts you’re calling, does it work (this makes sure your other JS aren’t somehow interfering).
That’s how I’d try to track down the problem.
One of the reasons I like to use the javacript solution is the control and flexibility I have over how the tooltip displays.