diff --git a/IPython/html/static/notebook/js/codecell.js b/IPython/html/static/notebook/js/codecell.js
index 37df9c3..c6d19c8 100644
--- a/IPython/html/static/notebook/js/codecell.js
+++ b/IPython/html/static/notebook/js/codecell.js
@@ -115,7 +115,7 @@ define([
 
     CodeCell.msg_cells = {};
 
-    CodeCell.prototype = new Cell();
+    CodeCell.prototype = Object.create(Cell.prototype);
 
     /**
      * @method auto_highlight
diff --git a/IPython/html/static/notebook/js/maintoolbar.js b/IPython/html/static/notebook/js/maintoolbar.js
index 7b56a86..6bb0f1b 100644
--- a/IPython/html/static/notebook/js/maintoolbar.js
+++ b/IPython/html/static/notebook/js/maintoolbar.js
@@ -27,7 +27,7 @@ define([
         this.bind_events();
     };
 
-    MainToolBar.prototype = new toolbar.ToolBar();
+    MainToolBar.prototype = Object.create(toolbar.ToolBar.prototype);
 
     MainToolBar.prototype.construct = function () {
         var that = this;
diff --git a/IPython/html/static/notebook/js/scrollmanager.js b/IPython/html/static/notebook/js/scrollmanager.js
index a93dcbc..45a3f83 100644
--- a/IPython/html/static/notebook/js/scrollmanager.js
+++ b/IPython/html/static/notebook/js/scrollmanager.js
@@ -68,7 +68,7 @@ define(['jquery'], function($){
         // Public constructor.
         ScrollManager.apply(this, [notebook, options]);
     };
-    TargetScrollManager.prototype = new ScrollManager();
+    TargetScrollManager.prototype = Object.create(ScrollManager.prototype);
 
     TargetScrollManager.prototype.is_target = function (index) {
         // Check if a cell should be a scroll stop.
@@ -114,7 +114,7 @@ define(['jquery'], function($){
         // Public constructor.
         TargetScrollManager.apply(this, [notebook, options]);
     };
-    SlideScrollManager.prototype = new TargetScrollManager();
+    SlideScrollManager.prototype = Object.create(TargetScrollManager.prototype);
 
     SlideScrollManager.prototype.is_target = function (index) {
         var cell = this.notebook.get_cell(index);
@@ -131,7 +131,7 @@ define(['jquery'], function($){
         options = options || {};
         this._level = options.heading_level || 1;
     };
-    HeadingScrollManager.prototype = new ScrollManager();
+    HeadingScrollManager.prototype = Object.create(ScrollManager.prototype)
 
     HeadingScrollManager.prototype.scroll = function (delta) {
         // Scroll the document.
diff --git a/IPython/html/static/notebook/js/textcell.js b/IPython/html/static/notebook/js/textcell.js
index f4668c9..89f112f 100644
--- a/IPython/html/static/notebook/js/textcell.js
+++ b/IPython/html/static/notebook/js/textcell.js
@@ -55,7 +55,7 @@ define([
         this.rendered = false;
     };
 
-    TextCell.prototype = new Cell();
+    TextCell.prototype = Object.create(Cell.prototype);
 
     TextCell.options_default = {
         cm_config : {
@@ -220,7 +220,7 @@ define([
         placeholder: "Type *Markdown* and LaTeX: $\\alpha^2$"
     };
 
-    MarkdownCell.prototype = new TextCell();
+    MarkdownCell.prototype = Object.create(TextCell.prototype);
 
     /**
      * @method render
@@ -270,7 +270,7 @@ define([
             "When passing through nbconvert, a Raw Cell's content is added to the output unmodified."
     };
 
-    RawCell.prototype = new TextCell();
+    RawCell.prototype = Object.create(TextCell.prototype);
 
     /** @method bind_events **/
     RawCell.prototype.bind_events = function () {
@@ -330,7 +330,7 @@ define([
         placeholder: "Type Heading Here"
     };
 
-    HeadingCell.prototype = new TextCell();
+    HeadingCell.prototype = Object.create(TextCell.prototype);
 
     /** @method fromJSON */
     HeadingCell.prototype.fromJSON = function (data) {