diff --git a/src/Action.js b/src/Action.js
index f11f1ba..952378c 100644
--- a/src/Action.js
+++ b/src/Action.js
@@ -22,7 +22,6 @@ define(
          * @extends Observable
          */
         function Action() {
-            Observable.apply(this, arguments);
         }
 
         /**
diff --git a/src/Model.js b/src/Model.js
index fd8be82..edf31f7 100644
--- a/src/Model.js
+++ b/src/Model.js
@@ -151,8 +151,6 @@ define(
          * @param {Object=} context 初始化的数据
          */
         function Model(context) {
-            Observable.apply(this, arguments);
-
             this._store = {};
 
             if (context) {
diff --git a/src/Observable.js b/src/Observable.js
index bb7fd13..6f4335f 100644
--- a/src/Observable.js
+++ b/src/Observable.js
@@ -26,6 +26,10 @@ define(
          * @public
          */
         Observable.prototype.on = function(type, handler) {
+            if (!this._events) {
+                this._events = {};
+            }
+
             var pool = this._events[type];
             if (!pool) {
                 pool = this._events[type] = [];
@@ -45,6 +49,10 @@ define(
          * @public
          */
         Observable.prototype.un = function(type, handler) {
+            if (!this._events) {
+                return;
+            }
+            
             if (!handler) {
                 this._events[type] = [];
                 return;
@@ -85,6 +93,10 @@ define(
          * @public
          */
         Observable.prototype.fire = function(type, event) {
+            if (!this._events) {
+                return;
+            }
+            
             if (Object.prototype.toString.call(event) === '[object Object]') {
                 event.type = type;
             }
diff --git a/src/View.js b/src/View.js
index 3986af3..5fcb9aa 100644
--- a/src/View.js
+++ b/src/View.js
@@ -21,7 +21,6 @@ define(
          * @extends Observable
          */
         function View() {
-            Observable.apply(this, arguments);
         }
 
         /**