"Press Enter To Continue"?

I’m doing up a flash file as a project, and so far I have one frame with 2 types of text, one introduction and another that says, “Press Enter To Continue…” I also have another frame side-by-side with another bunch of text.
I want to stop playing the animation at the very first frame, and only proceed to play the second frame if the person hits the Enter key on his keyboard. Alternatively, if I can allow the person to hit any key on the keyboard, that would be better.
I am unclear of what I am supposed to type in my ActionScript 3.0. Could anyone help me?
Thank you very much.