diff --git a/IPython/html/static/notebook/js/widgets/bool.js b/IPython/html/static/notebook/js/widgets/bool.js
index 3a3acef7a..54c6c0f72 100644
--- a/IPython/html/static/notebook/js/widgets/bool.js
+++ b/IPython/html/static/notebook/js/widgets/bool.js
@@ -54,7 +54,7 @@ define(["notebook/js/widget"], function(widget_manager){
                 this.$checkbox.prop('disabled', disabled);
 
                 var description = this.model.get('description');
-                if (description.length == 0) {
+                if (description.length === 0) {
                     this.$label.hide();
                 } else {
                     this.$label.html(description);
@@ -98,7 +98,7 @@ define(["notebook/js/widget"], function(widget_manager){
                 this.$button.prop('disabled', disabled);
 
                 var description = this.model.get('description');
-                if (description.length == 0) {
+                if (description.length === 0) {
                     this.$button.html(' '); // Preserve button height
                 } else {
                     this.$button.html(description);
diff --git a/IPython/html/static/notebook/js/widgets/button.js b/IPython/html/static/notebook/js/widgets/button.js
index e8bb0045c..cb3c4ae1d 100644
--- a/IPython/html/static/notebook/js/widgets/button.js
+++ b/IPython/html/static/notebook/js/widgets/button.js
@@ -36,7 +36,7 @@ define(["notebook/js/widget"], function(widget_manager){
             var description = this.model.get('description');
             description = description.replace(/ /g, ' ', 'm');
             description = description.replace(/\n/g, '<br>\n', 'm');
-            if (description.length == 0) {
+            if (description.length === 0) {
                 this.$el.html('&nbsp;'); // Preserve button height
             } else {
                 this.$el.html(description);
diff --git a/IPython/html/static/notebook/js/widgets/container.js b/IPython/html/static/notebook/js/widgets/container.js
index 458c7dd7a..de41f37cc 100644
--- a/IPython/html/static/notebook/js/widgets/container.js
+++ b/IPython/html/static/notebook/js/widgets/container.js
@@ -87,7 +87,7 @@ define(["notebook/js/widget"], function(widget_manager) {
                 .appendTo(this.$window)
                 .mousedown(function(){
                     that.bring_to_front();
-                });;
+                });
             this.$close = $('<button />')
                 .addClass('close icon-remove')
                 .css('margin-left', '5px')
@@ -156,7 +156,7 @@ define(["notebook/js/widget"], function(widget_manager) {
             this.$window.resizable();
             this.$window.on('resize', function(){
                 that.$body.outerHeight(that.$window.innerHeight() - that.$title_bar.outerHeight());
-            })
+            });
 
             this.$el_to_style = this.$body;
             this._shown_once = false;
@@ -173,7 +173,7 @@ define(["notebook/js/widget"], function(widget_manager) {
 
             this.$window.show();
             if (this.popped_out) {
-                this.$window.css("positon", "absolute")
+                this.$window.css("positon", "absolute");
                 this.$window.css("top", "0px");
                 this.$window.css("left", Math.max(0, (($('body').outerWidth() - this.$window.outerWidth()) / 2) + 
                     $(window).scrollLeft()) + "px");
@@ -192,7 +192,7 @@ define(["notebook/js/widget"], function(widget_manager) {
             max_zindex = Math.max(max_zindex, 2000);
 
             $widget_modals.each(function (index, el){
-                $el = $(el)
+                $el = $(el);
                 if (max_zindex == parseInt($el.css('z-index'))) {
                     $el.css('z-index', max_zindex - 1);
                 }
@@ -206,7 +206,7 @@ define(["notebook/js/widget"], function(widget_manager) {
             var description = this.model.get('description');
             description = description.replace(/ /g, '&nbsp;', 'm');
             description = description.replace(/\n/g, '<br>\n', 'm');
-            if (description.length == 0) {
+            if (description.length === 0) {
                 this.$title.html('&nbsp;'); // Preserve title height
             } else {
                 this.$title.html(description);
@@ -215,7 +215,7 @@ define(["notebook/js/widget"], function(widget_manager) {
             var button_text = this.model.get('button_text');
             button_text = button_text.replace(/ /g, '&nbsp;', 'm');
             button_text = button_text.replace(/\n/g, '<br>\n', 'm');
-            if (button_text.length == 0) {
+            if (button_text.length === 0) {
                 this.$show_button.html('&nbsp;'); // Preserve button height
             } else {
                 this.$show_button.html(button_text);
diff --git a/IPython/html/static/notebook/js/widgets/multicontainer.js b/IPython/html/static/notebook/js/widgets/multicontainer.js
index b69dd6a29..a70f54ebe 100644
--- a/IPython/html/static/notebook/js/widgets/multicontainer.js
+++ b/IPython/html/static/notebook/js/widgets/multicontainer.js
@@ -33,8 +33,8 @@ define(["notebook/js/widget"], function(widget_manager){
             var titles = this.model.get('_titles');
             for (var page_index in titles) {
 
-                var accordian = this.containers[page_index]
-                if (accordian != undefined) {
+                var accordian = this.containers[page_index];
+                if (accordian !== undefined) {
                     accordian
                         .find('.accordion-heading')
                         .find('.accordion-toggle')
@@ -95,7 +95,7 @@ define(["notebook/js/widget"], function(widget_manager){
             // open by default even though they don't have the `in` class
             // attached to them.  For some reason a delay is required.  
             // TODO: Better fix.
-            setTimeout(function(){that.update()}, 500);
+            setTimeout(function(){ that.update(); }, 500);
         },
     });
 
@@ -121,8 +121,8 @@ define(["notebook/js/widget"], function(widget_manager){
             // Set tab titles
             var titles = this.model.get('_titles');
             for (var page_index in titles) {
-                var tab_text = this.containers[page_index]
-                if (tab_text != undefined) {
+                var tab_text = this.containers[page_index];
+                if (tab_text !== undefined) {
                     tab_text.html(titles[page_index]);
                 }
             }
@@ -162,7 +162,7 @@ define(["notebook/js/widget"], function(widget_manager){
                 .append(view.$el)
                 .appendTo(this.$tab_contents);
 
-            if (index==0) {
+            if (index === 0) {
                 tab_text.tab('show');
             }
             this.update();
diff --git a/IPython/html/static/notebook/js/widgets/selection.js b/IPython/html/static/notebook/js/widgets/selection.js
index 61c328faa..3ce9f38b4 100644
--- a/IPython/html/static/notebook/js/widgets/selection.js
+++ b/IPython/html/static/notebook/js/widgets/selection.js
@@ -62,7 +62,7 @@ define(["notebook/js/widget"], function(widget_manager){
             var selected_item_text = this.model.get('value');
             selected_item_text = selected_item_text.replace(/ /g, '&nbsp;');
             selected_item_text = selected_item_text.replace(/\n/g, '<br>\n');
-            if (selected_item_text.length == 0) {
+            if (selected_item_text.length === 0) {
                 this.$droplabel.html('&nbsp;');
             } else {
                 this.$droplabel.html(selected_item_text);    
@@ -74,12 +74,8 @@ define(["notebook/js/widget"], function(widget_manager){
                 var that = this;
                 var item_button = $('<a href="#"/>')
                     .html(items[index])
-                    .on('click', function(e){
-                        that.model.set('value', $(e.target).html(), this);
-                        that.model.update_other_views(that);
-                    })
-                
-                this.$droplist.append($('<li />').append(item_button))
+                    .on('click', this.handle_click);
+                this.$droplist.append($('<li />').append(item_button));
             }
             
             if (this.model.get('disabled')) {
@@ -95,7 +91,7 @@ define(["notebook/js/widget"], function(widget_manager){
             }
 
             var description = this.model.get('description');
-            if (description.length == 0) {
+            if (description.length === 0) {
                 this.$label.hide();
             } else {
                 this.$label.html(description);
@@ -103,6 +99,12 @@ define(["notebook/js/widget"], function(widget_manager){
             }
             return IPython.WidgetView.prototype.update.call(this);
         },
+
+        // Handle when a value is clicked.
+        handle_click: function (e) {
+            this.model.set('value', $(e.target).html(), this);
+            this.model.update_other_views(this);
+        },
         
     });
 
@@ -136,22 +138,18 @@ define(["notebook/js/widget"], function(widget_manager){
             var disabled = this.model.get('disabled');
             for (var index in items) {
                 var item_query = ' :input[value="' + items[index] + '"]';
-                if (this.$el.find(item_query).length == 0) {
+                if (this.$el.find(item_query).length === 0) {
                     var $label = $('<label />')
                         .addClass('radio')
                         .html(items[index])
                         .appendTo(this.$container);
                     
-                    var that = this;
                     $('<input />')
                         .attr('type', 'radio')
                         .addClass(this.model)
                         .val(items[index])
                         .prependTo($label)
-                        .on('click', function(e){
-                            that.model.set('value', $(e.target).val(), this);
-                            that.model.update_other_views(that);
-                        });
+                        .on('click', this.handle_click);
                 }
                 
                 var $item_element = this.$container.find(item_query);
@@ -180,7 +178,7 @@ define(["notebook/js/widget"], function(widget_manager){
             });
 
             var description = this.model.get('description');
-            if (description.length == 0) {
+            if (description.length === 0) {
                 this.$label.hide();
             } else {
                 this.$label.html(description);
@@ -188,7 +186,12 @@ define(["notebook/js/widget"], function(widget_manager){
             }
             return IPython.WidgetView.prototype.update.call(this);
         },
-        
+
+        // Handle when a value is clicked.
+        handle_click: function (e) {
+            this.model.set('value', $(e.target).val(), this);
+            this.model.update_other_views(this);
+        },
     });
 
     widget_manager.register_widget_view('RadioButtonsView', RadioButtonsView);
@@ -222,18 +225,13 @@ define(["notebook/js/widget"], function(widget_manager){
             var disabled = this.model.get('disabled');
             for (var index in items) {
                 var item_query = ' :contains("' + items[index] + '")';
-                if (this.$buttongroup.find(item_query).length == 0) {
-                    
-                    var that = this;
+                if (this.$buttongroup.find(item_query).length === 0) {
                     $('<button />')
                         .attr('type', 'button')
                         .addClass('btn')
                         .html(items[index])
                         .appendTo(this.$buttongroup)
-                        .on('click', function(e){
-                            that.model.set('value', $(e.target).html(), this);
-                            that.model.update_other_views(that);
-                        });
+                        .on('click', this.handle_click);
                 }
                 
                 var $item_element = this.$buttongroup.find(item_query);
@@ -262,7 +260,7 @@ define(["notebook/js/widget"], function(widget_manager){
             });
 
             var description = this.model.get('description');
-            if (description.length == 0) {
+            if (description.length === 0) {
                 this.$label.hide();
             } else {
                 this.$label.html(description);
@@ -270,6 +268,12 @@ define(["notebook/js/widget"], function(widget_manager){
             }
             return IPython.WidgetView.prototype.update.call(this);
         },
+
+        // Handle when a value is clicked.
+        handle_click: function (e) {
+            this.model.set('value', $(e.target).html(), this);
+            this.model.update_other_views(this);
+        },
         
     });
 
@@ -302,17 +306,12 @@ define(["notebook/js/widget"], function(widget_manager){
             var items = this.model.get('values');
             for (var index in items) {
                 var item_query = ' :contains("' + items[index] + '")';
-                if (this.$listbox.find(item_query).length == 0) {
-                    
-                    var that = this;
+                if (this.$listbox.find(item_query).length === 0) {
                     $('<option />')
                         .html(items[index])
                         .attr('value', items[index])
                         .appendTo(this.$listbox)
-                        .on('click', function(e){
-                            that.model.set('value', $(e.target).html(), this);
-                            that.model.update_other_views(that);
-                        });
+                        .on('click', this.handle_click);
                 }
             }
 
@@ -340,7 +339,7 @@ define(["notebook/js/widget"], function(widget_manager){
             });
 
             var description = this.model.get('description');
-            if (description.length == 0) {
+            if (description.length === 0) {
                 this.$label.hide();
             } else {
                 this.$label.html(description);
@@ -348,6 +347,12 @@ define(["notebook/js/widget"], function(widget_manager){
             }
             return IPython.WidgetView.prototype.update.call(this);
         },
+
+        // Handle when a value is clicked.
+        handle_click: function (e) {
+            this.model.set('value', $(e.target).html(), this);
+            this.model.update_other_views(this);
+        },
         
     });
 
diff --git a/IPython/html/static/notebook/js/widgets/string.js b/IPython/html/static/notebook/js/widgets/string.js
index 2a8198fca..273ef3b3a 100644
--- a/IPython/html/static/notebook/js/widgets/string.js
+++ b/IPython/html/static/notebook/js/widgets/string.js
@@ -102,7 +102,7 @@ define(["notebook/js/widget"], function(widget_manager){
             this.$textbox.prop('disabled', disabled);
 
             var description = this.model.get('description');
-            if (description.length == 0) {
+            if (description.length === 0) {
                 this.$label.hide();
             } else {
                 this.$label.html(description);
@@ -156,7 +156,7 @@ define(["notebook/js/widget"], function(widget_manager){
             this.$textbox.prop('disabled', disabled);
 
             var description = this.model.get('description');
-            if (description.length == 0) {
+            if (description.length === 0) {
                 this.$label.hide();
             } else {
                 this.$label.html(description);