I have a basic

input

element in a portlet that I want to attach a keyup event to (that looks for the enter key), but each time I press the enter key the outer netsuite wrapper so to speak tries to do something (submit the form) that eventually crashes the portlet iframe with the error

redirected too many times

I've tried adding

event.preventDefault()

and

event.stopPropagation()

, but no luck - has anyone seen this before?