Question

What will be the behaviour if I use Javascript onSubmit handler and jQuery submit handler together ?

<form action="" method="post" onSubmit="myJavascriptHandler();">
  <input type="submit" />
</form>
<script type="text/javascript">
$("form").submit(myJQueryHandler);
</script>

Answer 1

As you can see from the fiddle myJavascriptHandler would be called first and then myJQueryHandler. I think this is because jquery just adds one more event listener to the form leaving the old one intact.