Drop Down Menu Not Working In WordPress

Here I have a drop down navigation I have been playing around with. The actual “dropdown” is under the listed item “Learn to Surf.” I can not figure out why, but whenever I try to add this into a WordPress installation both the styling and js effect aren’t present. It’s not like I’m changing anything huge, I move the links to the stylesheets and scripts to my theme header, and add the unordered list from the HTML page (linked above) to a file called nav.php which I load in with `<?php include(TEMPLATEPATH . ‘/nav.php’);
`

Any help would be greatly appreciated.
Thanks