expanding menus

[iDoof]

Hello all,

Can someone guide me to a script for expandable menus? Basically, if I had a list of links:

Link 1
Link 2
Link 3

I want to be able to click on Link 1 and have Links 2 and 3 slide downward, revealing Link 1's sublinks. If you need an example, here is one: http://www.russkirbyportfolio.com/

I'm fairly certain this is a JavaScript thing, but perhaps not. Let me know if I'm unclear.

Thanks to everyone for your time!