diff --git a/src/includes/mytinytodo.js b/src/includes/mytinytodo.js
index 33a7962..8eb894c 100644
--- a/src/includes/mytinytodo.js
+++ b/src/includes/mytinytodo.js
@@ -5,6 +5,8 @@
 */
 
 (function(){
+	
+"use strict";
 
 var taskList = new Array(), taskOrder = new Array();
 var filter = { compl:0, search:'', due:'' };
@@ -33,6 +35,7 @@ var tabLists = {
 };
 var curList = 0;
 var tagsList = [];
+var _mtt; /* internal alias for window.mytinytodo */
 
 var mytinytodo = window.mytinytodo = _mtt = {
 
@@ -2232,4 +2235,4 @@ function mttPrompt(msg, defaultValue, callbackOk, callbackCancel)
 }
 
 
-})();
\ No newline at end of file
+})();
diff --git a/src/includes/mytinytodo_ajax_storage.js b/src/includes/mytinytodo_ajax_storage.js
index b6ff2c0..9d767c9 100644
--- a/src/includes/mytinytodo_ajax_storage.js
+++ b/src/includes/mytinytodo_ajax_storage.js
@@ -7,6 +7,8 @@
 // AJAX myTinyTodo Storage
 
 (function(){
+	
+"use strict";
 
 var mtt;
 
@@ -180,4 +182,4 @@ mytinytodoStorageAjax.prototype =
 
 };
 
-})();
\ No newline at end of file
+})();