A friend of mine who is a web UI specialist just put up an article about the complexities (and a fix) of showing and hiding parts of the UI when there is mix of css and javascript and javascript is disabled.
I prefer to leave these subtleties to him, but I think there may be some people here who would like the solution.
http://arapehlivanian.com/2007/02/14/understanding-and-solving-the-javascriptcss-entanglement-phenomenon/