JS changes to load drag and drop

app/assets/javascripts/page_edit.js.erb

@@ -34,6 +34,10 @@ $('.part_kind').live('click', function() {
 });
 
 $(document).ready(function(){
+	bindTreeDragHandle();
+});
+
+var bindTreeDragHandle = function(){
 	$('ol.sortable').nestedSortable({
 		disableNesting: 'no-nest',
 		forcePlaceholderSize: true,
@@ -52,4 +56,4 @@ $(document).ready(function(){
 			$.post("<%= Rails.application.routes.url_helpers.admin_update_position_path %>", { id: ui.item.attr('id'), parent_id: ui.item.parent().closest('li').attr('id'), position: ui.item.index() } );
   	}
 	});
-});
+}