Need Help With Menu!

[Edit: The first one to help me out with this menu will be givin Free Advertaisment on our site when it is done!]

Hi guys

I need some help with a Flash Menu im making!

It looks like this

What i need help with is to make it into a drop down menu!

Like this forexample

As you click on Community the buttons under it will move down and the options under the menu comes out!

Then if you press another button Community should close up and the other one drop down!

Could anybody help me with this?

Thx! :s: