title: prevent other event keydown on change
body: <p>on my textbox i have 2 events onchange and keydown(for enter)
  now i did validation on onchange event if any validation fail then i raise alert
  but when i press press enter button if validation failed then i dont want to execute
  keydown event</p>
  
  <p>any suggestion</p>
  
  <p>Thanks,
  Nik</p>