diff --git a/demo/js/main.js b/demo/js/main.js
index 293507c354..a3d121f34c 100644
--- a/demo/js/main.js
+++ b/demo/js/main.js
@@ -13,8 +13,8 @@ Demo.Main = BI.inherit(BI.Widget, {
                         type: "demo.north",
                         listeners: [{
                             eventName: Demo.North.EVENT_VALUE_CHANGE,
-                            action: function () {
-                                center.setValue(0);
+                            action: function (v) {
+                                center.setValue(v);
                             }
                         }]
                     }
diff --git a/demo/js/north.js b/demo/js/north.js
index 89b07f7d8d..45e89cac69 100644
--- a/demo/js/north.js
+++ b/demo/js/north.js
@@ -13,7 +13,7 @@ Demo.North = BI.inherit(BI.Widget, {
                     listeners: [{
                         eventName: BI.Button.EVENT_CHANGE,
                         action: function () {
-                            self.fireEvent(Demo.North.EVENT_VALUE_CHANGE, 0)
+                            self.fireEvent(Demo.North.EVENT_VALUE_CHANGE, "demo.face")
                         }
                     }],
                     cls: "logo",
diff --git a/dist/core.js b/dist/core.js
index 38a32f6579..b997ee29f5 100644
--- a/dist/core.js
+++ b/dist/core.js
@@ -14244,11 +14244,15 @@ BI.Widget = BI.inherit(BI.OB, {
         if (o.invisible) {
             this.element.hide();
         }
-        if (o.disabled) {
-            this.element.addClass("base-disabled disabled");
-        }
-        if (o.invalid) {
-            this.element.addClass("base-invalid invalid");
+        if (o.disabled || o.invalid) {
+            BI.nextTick(BI.bind(function () {
+                if (this.options.disabled) {
+                    this.setEnable(false);
+                }
+                if (this.options.invalid) {
+                    this.setValid(false);
+                }
+            }, this));
         }
     },
 
diff --git a/src/core/widget.js b/src/core/widget.js
index 1326dee575..541c986998 100644
--- a/src/core/widget.js
+++ b/src/core/widget.js
@@ -106,11 +106,15 @@ BI.Widget = BI.inherit(BI.OB, {
         if (o.invisible) {
             this.element.hide();
         }
-        if (o.disabled) {
-            this.element.addClass("base-disabled disabled");
-        }
-        if (o.invalid) {
-            this.element.addClass("base-invalid invalid");
+        if (o.disabled || o.invalid) {
+            BI.nextTick(BI.bind(function () {
+                if (this.options.disabled) {
+                    this.setEnable(false);
+                }
+                if (this.options.invalid) {
+                    this.setValid(false);
+                }
+            }, this));
         }
     },