diff --git a/IPython/html/static/notebook/js/widget.js b/IPython/html/static/notebook/js/widget.js
index 80457bb40..6b3927c2a 100644
--- a/IPython/html/static/notebook/js/widget.js
+++ b/IPython/html/static/notebook/js/widget.js
@@ -22,7 +22,7 @@
 // elsewhere.
 define(["components/underscore/underscore-min",
          "components/backbone/backbone-min",
-        ], function(){
+        ], function(underscore, backbone){
 
 
     //--------------------------------------------------------------------
@@ -480,6 +480,9 @@ define(["components/underscore/underscore-min",
     IPython.WidgetModel = WidgetModel;
     IPython.WidgetView = WidgetView;
 
-    IPython.widget_manager = new WidgetManager();
-
+    if (IPython.widget_manager==undefined || IPython.widget_manager==null) {
+        IPython.widget_manager = new WidgetManager();    
+    }
+    
+    return IPython.widget_manager;
 });
diff --git a/IPython/html/static/notebook/js/widgets/bool.js b/IPython/html/static/notebook/js/widgets/bool.js
index 9a868256c..1f86b364c 100644
--- a/IPython/html/static/notebook/js/widgets/bool.js
+++ b/IPython/html/static/notebook/js/widgets/bool.js
@@ -14,10 +14,10 @@
  * @namespace IPython
  **/
 
-define(["notebook/js/widget"], function(){
+define(["notebook/js/widget"], function(widget_manager){
     
     var BoolWidgetModel = IPython.WidgetModel.extend({});
-    IPython.widget_manager.register_widget_model('BoolWidgetModel', BoolWidgetModel);
+    widget_manager.register_widget_model('BoolWidgetModel', BoolWidgetModel);
 
     var CheckboxView = IPython.WidgetView.extend({
       
@@ -66,7 +66,7 @@ define(["notebook/js/widget"], function(){
         
     });
 
-    IPython.widget_manager.register_widget_view('CheckboxView', CheckboxView);
+    widget_manager.register_widget_view('CheckboxView', CheckboxView);
 
     var ToggleButtonView = IPython.WidgetView.extend({
       
@@ -119,6 +119,6 @@ define(["notebook/js/widget"], function(){
         },
     });
 
-    IPython.widget_manager.register_widget_view('ToggleButtonView', ToggleButtonView);
+    widget_manager.register_widget_view('ToggleButtonView', ToggleButtonView);
 
 });
diff --git a/IPython/html/static/notebook/js/widgets/button.js b/IPython/html/static/notebook/js/widgets/button.js
index bea17eb5d..ff9a9f66b 100644
--- a/IPython/html/static/notebook/js/widgets/button.js
+++ b/IPython/html/static/notebook/js/widgets/button.js
@@ -14,10 +14,10 @@
  * @namespace IPython
  **/
 
-define(["notebook/js/widget"], function(){
+define(["notebook/js/widget"], function(widget_manager){
     
     var ButtonWidgetModel = IPython.WidgetModel.extend({});
-    IPython.widget_manager.register_widget_model('ButtonWidgetModel', ButtonWidgetModel);
+    widget_manager.register_widget_model('ButtonWidgetModel', ButtonWidgetModel);
 
     var ButtonView = IPython.WidgetView.extend({
       
@@ -51,6 +51,6 @@ define(["notebook/js/widget"], function(){
         
     });
 
-    IPython.widget_manager.register_widget_view('ButtonView', ButtonView);
+    widget_manager.register_widget_view('ButtonView', ButtonView);
 
 });
diff --git a/IPython/html/static/notebook/js/widgets/container.js b/IPython/html/static/notebook/js/widgets/container.js
index 2d041af68..b89f57289 100644
--- a/IPython/html/static/notebook/js/widgets/container.js
+++ b/IPython/html/static/notebook/js/widgets/container.js
@@ -14,9 +14,9 @@
  * @namespace IPython
  **/
 
-define(["notebook/js/widget"], function(){
+define(["notebook/js/widget"], function(widget_manager) {
     var ContainerModel = IPython.WidgetModel.extend({});
-    IPython.widget_manager.register_widget_model('ContainerWidgetModel', ContainerModel);
+    widget_manager.register_widget_model('ContainerWidgetModel', ContainerModel);
 
     var ContainerView = IPython.WidgetView.extend({
         
@@ -58,5 +58,5 @@ define(["notebook/js/widget"], function(){
         },
     });
 
-    IPython.widget_manager.register_widget_view('ContainerView', ContainerView);
+    widget_manager.register_widget_view('ContainerView', ContainerView);
 });
\ No newline at end of file
diff --git a/IPython/html/static/notebook/js/widgets/float.js b/IPython/html/static/notebook/js/widgets/float.js
index d7ed1b065..86839b07e 100644
--- a/IPython/html/static/notebook/js/widgets/float.js
+++ b/IPython/html/static/notebook/js/widgets/float.js
@@ -14,7 +14,7 @@
  * @namespace IPython
  **/
 
-define(["notebook/js/widget"], function(){
+define(["notebook/js/widget"], function(widget_manager){
     var FloatWidgetModel = IPython.WidgetModel.extend({});
-    IPython.widget_manager.register_widget_model('FloatWidgetModel', FloatWidgetModel);
+    widget_manager.register_widget_model('FloatWidgetModel', FloatWidgetModel);
 });
\ No newline at end of file
diff --git a/IPython/html/static/notebook/js/widgets/int.js b/IPython/html/static/notebook/js/widgets/int.js
index dae7a2f4e..46877ac0b 100644
--- a/IPython/html/static/notebook/js/widgets/int.js
+++ b/IPython/html/static/notebook/js/widgets/int.js
@@ -14,7 +14,7 @@
  * @namespace IPython
  **/
 
-define(["notebook/js/widget"], function(){
+define(["notebook/js/widget"], function(widget_manager){
     var IntWidgetModel = IPython.WidgetModel.extend({});
-    IPython.widget_manager.register_widget_model('IntWidgetModel', IntWidgetModel);
+    widget_manager.register_widget_model('IntWidgetModel', IntWidgetModel);
 });
\ No newline at end of file
diff --git a/IPython/html/static/notebook/js/widgets/multicontainer.js b/IPython/html/static/notebook/js/widgets/multicontainer.js
index e678fbdbc..296d0169f 100644
--- a/IPython/html/static/notebook/js/widgets/multicontainer.js
+++ b/IPython/html/static/notebook/js/widgets/multicontainer.js
@@ -14,9 +14,9 @@
  * @namespace IPython
  **/
 
-define(["notebook/js/widget"], function(){
+define(["notebook/js/widget"], function(widget_manager){
     var MulticontainerModel = IPython.WidgetModel.extend({});
-    IPython.widget_manager.register_widget_model('MulticontainerWidgetModel', MulticontainerModel);
+    widget_manager.register_widget_model('MulticontainerWidgetModel', MulticontainerModel);
 
     var AccordionView = IPython.WidgetView.extend({
         
@@ -97,7 +97,7 @@ define(["notebook/js/widget"], function(){
         },
     });
 
-    IPython.widget_manager.register_widget_view('AccordionView', AccordionView);
+    widget_manager.register_widget_view('AccordionView', AccordionView);
     
     var TabView = IPython.WidgetView.extend({
         
@@ -174,5 +174,5 @@ define(["notebook/js/widget"], function(){
         },
     });
 
-    IPython.widget_manager.register_widget_view('TabView', TabView);
+    widget_manager.register_widget_view('TabView', TabView);
 });
diff --git a/IPython/html/static/notebook/js/widgets/selection.js b/IPython/html/static/notebook/js/widgets/selection.js
index e5ae5a385..77de43cd4 100644
--- a/IPython/html/static/notebook/js/widgets/selection.js
+++ b/IPython/html/static/notebook/js/widgets/selection.js
@@ -14,9 +14,9 @@
  * @namespace IPython
  **/
 
-define(["notebook/js/widget"], function(){
+define(["notebook/js/widget"], function(widget_manager){
     var SelectionWidgetModel = IPython.WidgetModel.extend({});
-    IPython.widget_manager.register_widget_model('SelectionWidgetModel', SelectionWidgetModel);
+    widget_manager.register_widget_model('SelectionWidgetModel', SelectionWidgetModel);
 
     var DropdownView = IPython.WidgetView.extend({
         
@@ -106,7 +106,7 @@ define(["notebook/js/widget"], function(){
         
     });
 
-    IPython.widget_manager.register_widget_view('DropdownView', DropdownView);
+    widget_manager.register_widget_view('DropdownView', DropdownView);
 
     var RadioButtonsView = IPython.WidgetView.extend({
         
@@ -191,7 +191,7 @@ define(["notebook/js/widget"], function(){
         
     });
 
-    IPython.widget_manager.register_widget_view('RadioButtonsView', RadioButtonsView);
+    widget_manager.register_widget_view('RadioButtonsView', RadioButtonsView);
 
 
     var ToggleButtonsView = IPython.WidgetView.extend({
@@ -273,5 +273,5 @@ define(["notebook/js/widget"], function(){
         
     });
 
-    IPython.widget_manager.register_widget_view('ToggleButtonsView', ToggleButtonsView);
+    widget_manager.register_widget_view('ToggleButtonsView', ToggleButtonsView);
 });
diff --git a/IPython/html/static/notebook/js/widgets/string.js b/IPython/html/static/notebook/js/widgets/string.js
index 2478b443c..d7c24823c 100644
--- a/IPython/html/static/notebook/js/widgets/string.js
+++ b/IPython/html/static/notebook/js/widgets/string.js
@@ -14,9 +14,9 @@
  * @namespace IPython
  **/
 
-define(["notebook/js/widget"], function(){
+define(["notebook/js/widget"], function(widget_manager){
     var StringWidgetModel = IPython.WidgetModel.extend({});
-    IPython.widget_manager.register_widget_model('StringWidgetModel', StringWidgetModel);
+    widget_manager.register_widget_model('StringWidgetModel', StringWidgetModel);
 
     var LabelView = IPython.WidgetView.extend({
       
@@ -35,7 +35,7 @@ define(["notebook/js/widget"], function(){
         
     });
 
-    IPython.widget_manager.register_widget_view('LabelView', LabelView);
+    widget_manager.register_widget_view('LabelView', LabelView);
 
     var TextAreaView = IPython.WidgetView.extend({
       
@@ -89,7 +89,7 @@ define(["notebook/js/widget"], function(){
         },
     });
 
-    IPython.widget_manager.register_widget_view('TextAreaView', TextAreaView);
+    widget_manager.register_widget_view('TextAreaView', TextAreaView);
 
     var TextBoxView = IPython.WidgetView.extend({
       
@@ -143,5 +143,5 @@ define(["notebook/js/widget"], function(){
         },
     });
 
-    IPython.widget_manager.register_widget_view('TextBoxView', TextBoxView);
+    widget_manager.register_widget_view('TextBoxView', TextBoxView);
 });