Thanks everyone for the input - basically here's what I wound up doing-
<input onkeypress="keypress_callback" name='foo'>
<script>
function keypress_callback () {
if (window.event.keycode == 13) {
do stuff
}
</script>
easy!
James
(Geez - did I learn all about IE5/ Mac's failings this weekend - I could
write a book. Maybe I will... )