CSS Disjointed Menu - How To?

Greetings. I'm probably not describing this properly but I'm looking to do a two level menu system similar to:

http://www.elementskateboards.com/

Clicks "Artists" or "Our Roots" to see the second level menu items.

Can anyone point me to a tutorial or article?

Any advice would be appreciated.

Thanks.

That one is Flash.
Alternatives:
http://www.htmldog.com/articles/suckerfish/dropdowns/
http://www.cssplay.co.uk/menus/doors_drop_line.html