Hi Toby,
I'm not too clear on what you mean by "a series of drop-down menus". If you would offer some clarification, I'd be glad to help in any way possible.
I highly recommend the JavaScript tutorial at www.webmonkey.com. In my opinion, that tutorial is the best JavaScript reference on the net, period. However, if online learning doesn't work, you can always buy a reference guide offline. They're very helpful, if you have the persistence to learn.
Finally, CSS is not really a language that you need to learn. Like HTML, all you will need to do is memorize a few things, and you're well on your way. There are tons of great resources on CSS on the web. Just run a search on Google, and that should turn up plenty of results. 
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