title: Submit form when enter key pressed using Prototype javascript
body: <p>I've seen some other questions around this, but none for Prototype.</p>
  
  <p>I have a form without a submit button (uses a styled link that calls some javascript).</p>
  
  <p>What's the best way to detect a enter keypress in all the input fields and submit the form?</p>
  
  <p>Thanks!</p>