diff --git a/IPython/html/static/notebook/js/widgetmanager.js b/IPython/html/static/notebook/js/widgetmanager.js
index 8bc511e..752fdf4 100644
--- a/IPython/html/static/notebook/js/widgetmanager.js
+++ b/IPython/html/static/notebook/js/widgetmanager.js
@@ -66,37 +66,37 @@
         WidgetManager.prototype.register_widget_view = function (widget_view_name, widget_view_type) {
             this.widget_view_types[widget_view_name] = widget_view_type;
         };
-	WidgetManager.prototype.handle_msg = function(msg, model) {
-	    var method = msg.content.data.method;
-	    switch (method) {
-		case 'display':
-		    var cell = this.get_msg_cell(msg.parent_header.msg_id);
-		    if (cell === null) {
-			console.log("Could not determine where the display" + 
-				    " message was from.  Widget will not be displayed");
-		    } else {
-			var view = this.create_view(model, 
-						    msg.content.data.view_name, cell);
-			if (view !== undefined 
-			    && cell.widget_subarea !== undefined 
-			    && cell.widget_subarea !== null) {
+    WidgetManager.prototype.handle_msg = function(msg, model) {
+        var method = msg.content.data.method;
+        switch (method) {
+        case 'display':
+            var cell = this.get_msg_cell(msg.parent_header.msg_id);
+            if (cell === null) {
+            console.log("Could not determine where the display" + 
+                    " message was from.  Widget will not be displayed");
+            } else {
+            var view = this.create_view(model, 
+                            msg.content.data.view_name, cell);
+            if (view !== undefined 
+                && cell.widget_subarea !== undefined 
+                && cell.widget_subarea !== null) {
                             cell.widget_area.show();
                             cell.widget_subarea.append(view.$el);
-			}
-		    }
-		    break;
-	    }
-	}
-
-	WidgetManager.prototype.create_view = function(model, view_name, cell) {
-	    view_name = view_name || model.get('default_view_name');
+            }
+            }
+            break;
+        }
+    }
+
+    WidgetManager.prototype.create_view = function(model, view_name, cell) {
+        view_name = view_name || model.get('default_view_name');
             var ViewType = this.widget_view_types[view_name];
             if (ViewType !== undefined && ViewType !== null) {
                 var view = new ViewType({model: model, widget_manager: this, cell: cell});
                 view.render();
-		model.views.push(view);
-		model.on('destroy', view.remove, view);
-		/*
+        model.views.push(view);
+        model.on('destroy', view.remove, view);
+        /*
                 // TODO: handle view deletion.  Don't forget to delete child views
                 var that = this;
                 view.$el.on("remove", function () { 
@@ -108,10 +108,10 @@
 
                     // Close the comm if there are no views left.
                     if (that.views.length() === 0) {
-			//trigger comm close event?
+            //trigger comm close event?
                         }
 
-		        
+                
                         if (that.comm !== undefined) {
                             that.comm.close();
                             delete that.comm.model; // Delete ref so GC will collect widget model.
@@ -119,20 +119,20 @@
                         }
                         delete that.widget_id; // Delete id from model so widget manager cleans up.
                     });
-		*/
+        */
                 return view;
             }
         },
 
         WidgetManager.prototype.get_msg_cell = function (msg_id) {
-	    var cell = null;
+        var cell = null;
             // First, check to see if the msg was triggered by cell execution.
             if (IPython.notebook !== undefined && IPython.notebook !== null) {
                 cell = IPython.notebook.get_msg_cell(msg_id);
             }
-	    if (cell !== null) {
-		return cell
-	    }
+        if (cell !== null) {
+        return cell
+        }
             // Second, check to see if a get_cell callback was defined
             // for the message.  get_cell callbacks are registered for
             // widget messages, so this block is actually checking to see if the
diff --git a/IPython/html/static/notebook/js/widgets/base.js b/IPython/html/static/notebook/js/widgets/base.js
index 230c926..2614e1c 100644
--- a/IPython/html/static/notebook/js/widgets/base.js
+++ b/IPython/html/static/notebook/js/widgets/base.js
@@ -292,7 +292,7 @@ function(widget_manager, underscore, backbone){
                 elements.removeClass(class_list);
             }
         },
-	
+    
         update: function () {
             // the very first update seems to happen before the element is finished rendering
             // so we use setTimeout to give the element time to render
diff --git a/IPython/html/static/notebook/js/widgets/multicontainer.js b/IPython/html/static/notebook/js/widgets/multicontainer.js
index a1fdb08..27bfc29 100644
--- a/IPython/html/static/notebook/js/widgets/multicontainer.js
+++ b/IPython/html/static/notebook/js/widgets/multicontainer.js
@@ -119,10 +119,10 @@ define(["notebook/js/widgets/base"], function(widget_manager){
     
     var TabView = IPython.WidgetView.extend({
         
-	initialize: function() {
-	    this.containers = [];
-	    IPython.WidgetView.prototype.initialize.apply(this, arguments);
-	},
+    initialize: function() {
+        this.containers = [];
+        IPython.WidgetView.prototype.initialize.apply(this, arguments);
+    },
 
         render: function(){
             var uuid = 'tabs'+IPython.utils.uuid();
@@ -134,11 +134,11 @@ define(["notebook/js/widgets/base"], function(widget_manager){
             this.$tab_contents = $('<div />', {id: uuid + 'Content'})
                 .addClass('tab-content')
                 .appendTo(this.$el);
-	    var children = this.model.get('children');
-	    for (var i in children) {
-		this.add_child_view(this.child_view(children[i]))
-	    }
-	    this.update();
+        var children = this.model.get('children');
+        for (var i in children) {
+        this.add_child_view(this.child_view(children[i]))
+        }
+        this.update();
         },
 
         update: function() {