diff --git a/static/js/Wiki.js b/static/js/Wiki.js
index 7a29e9d..965a6cc 100644
--- a/static/js/Wiki.js
+++ b/static/js/Wiki.js
@@ -2118,9 +2118,9 @@ Wiki.prototype.declutter_clicked = function () {
   if ( link_area_holder )
     addElementClass( link_area_holder, "undisplayed" );
 
-  var note_tree_area_holder = getElement( "note_tree_area_holder" );
-  if ( note_tree_area_holder )
-    addElementClass( note_tree_area_holder, "undisplayed" );
+  var left_area = getElement( "left_area" );
+  if ( left_area )
+    addElementClass( left_area, "undisplayed" );
 
   var clutter_link = getElement( "clutter_link" );
   if ( clutter_link ) {
@@ -2151,9 +2151,9 @@ Wiki.prototype.clutter_clicked = function () {
   if ( link_area_holder )
     removeElementClass( link_area_holder, "undisplayed" );
 
-  var note_tree_area_holder = getElement( "note_tree_area_holder" );
-  if ( note_tree_area_holder )
-    removeElementClass( note_tree_area_holder, "undisplayed" );
+  var left_area = getElement( "left_area" );
+  if ( left_area )
+    removeElementClass( left_area, "undisplayed" );
 
   var clutter_link = getElement( "clutter_link" );
   if ( clutter_link )