website errors in IE

[login to view URL] this section of my works website, doesnt work in internet explorer, in firefox it works perfectly fine, In explorer it comes up with errors, and when you click on the links down the bottom (i.e, domestic beers, spirits) the list above should go straight to the list that link says. in explorer it doesnt, but in firefox it works perfectly fine. All the clients who use the website use internet explorer, so this needs to be resolved