Need help moving objects on mouse over

Hi, I am trying to do this…

[AnyWord]

How do I make it so that when I put my mouse on the [AnyWord]
it turns into this (motion tween of course)

[---- AnyWord ----] (without the “----”)

and then when u move ur mouse away form it, it goes back to

[AnyWord]

I got all the keyframes down and everythign and the motion tweening I just dont understand the actionscript part of it.