How to prevent AutoPostBack when DropDownlist is selected using jQuery

Question

I want to show a confirm dialog when the user selects an item in a DropDownList. If the user presses \"Cancel\", I want to stop the postback. Here is the function I add to the o

Answer 1

You need to return from that function as well, like this:

$('.warn').change(imitateConfirmUnload);

Currently the return value isn't being used. This would also work:

$('.warn').change(function() {
  return imitateConfirmUnload();
});

Also, I'm pretty sure you want an equals check here:

if (window.onbeforeunload == null)
    return true;

Currently it's nulling out the onbeforeunload handler if it was present.