title: Is there a OnExit or Leave event on ASP.NET textbox?
body: <p>I need to run some code on server when user leaves the Textbox, it will do some calculations on what has been typed. I'd rather avoid doing it with jQuery, because it would involve creating a JSON server, etc.</p>
  
  <p>Isn't there a way to do a postback for such an event?</p>