Smooth motion Q

Evening all. Got a small query. My flash actionscript work is average, I tend to do mostly design work and hand off to our coder who implements all the lovely actionscript goodness. But Im in the mood to ‘better’ myself! Never really had a strong head for coding, but picked quite a few things up in the past few month which have given me the taste! Anyway, back to my question…

I have a box (box A) and when I mouse over it I want it to scale horizontally to the size of box B, but quite fast, smooth and eases in, possibly a little bounce at the end! I could do it with tweens and a high frame rate but Id like to know how its done via AS. Added a swf to try demonstrate what I mean…