jquery and binding to 'destroy.ckeditor'?

I am using CK in asp.net and want to have CK update the TextAreas content before postback occurs. I can't figure out how to bind to 'destroy.ckeditor'.

Does anyone know how to achieve this?

if ($item.hasClass('CKSimple')) {
            $item.wrap('<div class="ck simple" />');
            $item.ckeditor(function() { /* callback code */},
               { toolbar: 'Basic', width: $item.width(), height: $item.height() }
            );
//            $(document).bind('destroy.ckeditor', function(ck) {
//               alert(ck.getData());
//            });
         }