Help with a Drop Down Navigation Menu

[bensd]

I am in the process of building a site, i currently have a simple css menu.

I have uploaded it here so you see:

http://www.gercia.com/menu/

I would like to make this a drop down menu, but wondered how/which way to do it?

Any help is much appreciated

[madk]

http://www.cssplay.co.uk/menus/dd_valid.html

Here is a link to a good tutoroal. No javascript - just CSS - and it validates.