title: How to prevent form from being submitted?
body: <p>I have a form that has a submit button in it somewhere.</p>
  
  <p>However, I would like to somehow 'catch' the submit event and prevent it from occurring.</p>
  
  <p>Is there some way I can do this?</p>
  
  <p>I can't modify the submit button, because it's part of a custom control.</p>