Ticket #22491: 22491.5.diff

wp-admin/edit-form-advanced.php

@@ -457 +457 @@
                 if ( changed )
                         return '<?php _e('The changes you made will be lost if you navigate away from this page.'); ?>';
         };
+
+        $('input[type="submit"], a.submitdelete', '#submitpost').click(function(){
+                window.onbeforeunload = null;
+                $(':button, :submit', '#submitpost').each(function(){
+                        var t = $(this);
+                        if ( t.hasClass('button-primary') )
+                                t.addClass('button-primary-disabled');
+                        else
+                                t.addClass('button-disabled');
+                });
+                $('#major-publishing-actions .spinner').show();
+        });
 })(jQuery);
 </script>
 <?php } ?>