Rollover and Popup Menu not working when site published

Hello,

We have designed a site using rollovers and popup menus. The site is
working fine locally, however once published the rollovers and the
popup menus are not working. We have uploaded the site to another
server for testing and it's working great.

Any idea why it is not working on the first server?
Thank you

Not working URL: http://www.radiotoronto.coop/
Working URL: http://www.onel.ca/radiotoronto/