Giving My Website a Facelift

I finally started the revamp on my Junee Magic Website Development site. This time I'm checking as I go to see if it's WC3 compliant. I added an expandable menu that isn't valid xhtml. It's frustrating, because I know it's okay. The ul's and li's have classes, and if I change it at all then the tree will be out of whack. Any suggestions would be greatly appreciated. I used the code from Bleeding Ego. Elise is using the same script at Learning Movable Type, and after checking the xhtml code I don't feel as bad. Maybe I need one of those little buttons that say the WC3 doesn't like me. Anyway, my new site is a long way from being published. I've done 2 pages and there's over 350, so I may be busy for a little while. Some of those pages I'll probably scrap, update the whole thing a bit, with new text and images. It's a less cluttered style. All done with divs and CSS, and a table here and there. (The old layout has about 6 - 10 nested tables.) A daunting process none the less!!