diff --git a/boards/static/js/main.js b/boards/static/js/main.js
old mode 100644
new mode 100755
--- a/boards/static/js/main.js
+++ b/boards/static/js/main.js
@@ -268,7 +268,8 @@ function addContextMenu() {
                         name: gettext('Hide/show'),
                         callback: function(key, opt) {
                             togglePostHidden(postId);
-                        }
+                        },
+                        visible: !!localStorage
                     },
                     edit: {
                         name: gettext('Edit'),