Buttons for navigation

There should be an easy way around this, but I’m trying to make a navigation where you rollover to fade-in an image with links on it (well actually it’s just an image with words on it, but I was planning on using invisible buttons for the links). Well since stacking buttons on top of each other won’t work, what could I do to solve this problem? Should I integrate Javascript?

I attached the .fla if you want to take a look at it.

Thanks in advance!

By the way, I’m using Flash MX 2004 if it matters.