During the final tweaking and testing of the restyling of my employers website, I have found that for some reason, on one page of the site, two JS drop down menus are having a rather odd failure. Well, actually the menus are still working, but upon mouseover of the menu, the rest of the page shows a (well two) "page cannot be found" errors. This problem is only happening on this particular page, and the page goes back to normal on mouse-out of the menu. I am at a total loss as I am not the original coder of the website and I have no knowledge of the scripting used. If someone could please take a look at the page and tell me what the problem is, it would be greatly appreciated.
I had planned on placing the code in the post, but I am given an error that the post is too long, so here is the URL.