title: How to raise an event without the full postback?
body: <p>I have two controls in an UpdatePanel; a checkbox and a timepicker.</p>
  
  <p>When I click the checkbox (event CheckedChanged) it is supposed to make the timepicker editable (ReadOnly = false) and vice-versa. I want the event CheckedChanged raised without doing a full postback.</p>
  
  <p>Is there a workaround without doing it in javascript? I don't know well how triggers on an UpdatePanel are managed.</p>
  
  <p>Thanks!</p>
  
  <p>(asp.net 4.0, C#)</p>