keycode 13 is for which key

Question

Which is the key on the keyboard having the keycode as 13?

switch(key) {
  case 37: 
    $.keynav.goLeft();
    break;
  case 38: 
    $.keynav.goUp         


        

Answer 1

The Enter key should have the keycode 13. Is it not working?

Answer 2

That would be the Enter key.