How can I use "enter" to submit a form in a frame using javascript?

Hi,

I'm making a web page using multiple frames. One frame has an animation of a tiger fingerspelling a word (using American Sign Language handshapes). When the user thinks they know the word, they input it in a text box in a second frame (which has all of the useful javascript code to detect if the correct answer was given or not). When I run the "input box" code by itself, when I hit "enter", it moves on to the next word just fine. When it is in the frame, however, something seems to be getting confused. It resets the game basically rather than submitting the guess. I think it has something to do with the frames - so I think I need something in the main frames page saying "if you get an enter, push the button in the input box frame".

By the way, this is the only button in any of the frames.

-BYUCoug2