Milonic JavaScript Menu

I did try to add tooltip.js on the webpage. But the browser reports the same error. Is there any requirement on where to put the script?
The webpage uses showtip and hidetip methods.
Thanks.

The tooltips are not working. It used to work.
InternetExplorer does not show any meaningful error message. But FireFox points to tooltips.js.
Thanks.

The link is
https://www.lind-waldock.com/vquotes/vq_delayquotes.cgi
The tooltip is linked with the product names.

Thanks.

The tooltips worked fine. Somehow it stops working. Error Console in FireFox reports the following errors whenever mouse hovers around the page:
"$F is not defined"
"_TtSo is not defined"
"_Tgm is not defined"
Any clue on what might cause the problem? Thanks.