Any behaviors you see are provided by the browser. What you are seeing on a
multi-down is that some browsers let you press enter to select the current
entry and move to the next field. To do what you want, you'd need to trap
keyboard entry using JavaScript, perhaps with onkeydown/onkeypress/onkeyup
and event.keycode('13')
Here's a short discussion that might help:
http://forums.devx.com/showthread.php?t=6688
But I would strongly recommend against changing this since most users expect
enter to submit the form.
