diff --git a/app/views/admin/personal_plugin_fields/_render_table.html.erb b/app/views/admin/personal_plugin_fields/_render_table.html.erb
index 4273887..5711bfd 100644
--- a/app/views/admin/personal_plugin_fields/_render_table.html.erb
+++ b/app/views/admin/personal_plugin_fields/_render_table.html.erb
@@ -62,9 +62,9 @@
           handle: ".brand",
           update: function(event, ui) {
             var item = ui.item;
-            var new_index = item.index();
-            var old_index = item.attr("index");
-            var indices = [new_index,old_index].sort();
+            var n_index = item.index();
+            var o_index = item.attr("index");
+            var indices = [n_index,o_index].sort();
             for(var new_i=indices[0];new_i<=indices[1];new_i++){
               var td = item.parent().find(">").eq(new_i);
               td.attr("index",new_i);