Use Return Key to trigger function?

Question

I've got a little form in a movieclip where the student is to
do some simple subtraction, then click the Record button to enter
the data into a table. Problem is that if someone types in the
answer, they naturally want to hit the Return key to enter the
data, however, it instead puts a carriage return in their answer
and when they try submitting with the Record button, it checks
their answer and it is now wrong since the added carriage return
does not match the answer they should have. Is there any way to
make the Return key trigger the recordIt() function? Here is my
code:

Answer 1

Here is what I ended up adding:
stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDownListener);
function keyDownListener(e:KeyboardEvent) {
if ((e.keyCode == Keyboard.ENTER) && (diameter.text
!= "") && (difference.text != "")) {
recordIt(e);
}