title: DropdownList autoposback after client confirmation
body: <p>I have a dropdownlist with the autopostback set to true. I want the
  user to confirm if they really want to change the value,
  which on post back fires a server side event (selectedindexchanged).</p>
  
  <p>I have tried adding an onchange attribute "return confirm('Please click OK to change. Otherwise click CANCEL?';") but it will not postback regardless of the confirm
  result and the value in the list does not revert back if cancel
  selected. </p>
  
  <p>When I remove the onchange attribute from the DropdownList tag, the page does postback. It does not when the onchange attribute is added. Do I still need to wire the event handler (I'm on C# .Net 2.0 ).</p>
  
  <p>Any leads will be helpful.</p>
  
  <p>Thanks!</p>