Button inside Button with no problems!

Hello, I would like to know how can I create a button inside a button. It’s a very strange question, but you may see an example here.

www.lacoste.com

I just loved the bottom buttons (Bar containg links (or buttons) to something else). If someone could explain how to get that same effect, i would be very glad. Thank you.

Those are actually 2 movie clips each with there own seperate buttons, thats how it changes the colors

Can anybody make a little sketch in FLASH for this???
I tried but it seems that Movie Clips wont follow “Button Scripts” (RollOver, Out…)
A little thing would do, Thanx