shows a bug with chrome event handling

chrome_form_submission_event_bug.html

<form onsubmit='alert("should not get here");'>
<input id="text" type="text" placeholder="type something and hit enter">
</form>

<script>
var t = document.getElementById('text');
t.addEventListener('keydown', function(e) {
  if (e.which === 13) { // hitting return
    alert('form submission should be prevented');
    e.stopPropagation();
    e.stopImmediatePropagation();
    e.preventDefault();
  }
});
</script>

if you take out the 'form submission should be prevented' alert, the form submission is prevented

also, see http://jsfiddle.net/86maU/