diff --git a/src/base/layer/layer.popup.js b/src/base/layer/layer.popup.js
index 731510c42..6255975ab 100644
--- a/src/base/layer/layer.popup.js
+++ b/src/base/layer/layer.popup.js
@@ -380,11 +380,12 @@ BI.PopupView = BI.inherit(BI.Widget, {
                 default:
                     break;
             }
-            this.element.removeClass("left")
-            .removeClass("right")
-            .removeClass("top")
-            .removeClass("bottom")
-            .addClass(direction);
+            this.element
+                .removeClass("left")
+                .removeClass("right")
+                .removeClass("top")
+                .removeClass("bottom")
+                .addClass(direction);
             this.arrow.element.css(style);
             this.arrowWrapper.element.css(wrapperStyle);
             this.placeholder.element.css(placeholderStyle);
diff --git a/src/base/list/listview.js b/src/base/list/listview.js
index 65f777a99..bca51e3cc 100644
--- a/src/base/list/listview.js
+++ b/src/base/list/listview.js
@@ -21,13 +21,13 @@ BI.ListView = BI.inherit(BI.Widget, {
     },
 
     init: function () {
-        var self = this;
         this.renderedIndex = -1;
         this.cache = {};
     },
 
     render: function () {
         var self = this, o = this.options;
+
         return {
             type: "bi.vertical",
             items: [BI.extend({
@@ -72,10 +72,11 @@ BI.ListView = BI.inherit(BI.Widget, {
         var index = (this.cache[this.renderedIndex] && (this.cache[this.renderedIndex].index + o.blockSize)) || 0;
         var cnt = this.renderedIndex + 1;
         var lastHeight;
-        var getElementHeight = function () {
+        function getElementHeight () {
             return self.container.element.height();
-        };
-        while ((lastHeight = getElementHeight()) < minContentHeight && index < o.items.length) {
+        }
+        lastHeight = getElementHeight();
+        while ((lastHeight) < minContentHeight && index < o.items.length) {
             var items = o.items.slice(index, index + o.blockSize);
             this.container.addItems(items.map(function (item, i) {
                 return o.itemFormatter(item, index + i);
@@ -93,7 +94,6 @@ BI.ListView = BI.inherit(BI.Widget, {
     },
 
     _calculateBlocksToRender: function () {
-        var o = this.options;
         this._renderMoreIf();
     },
 
diff --git a/src/base/list/virtualgrouplist.js b/src/base/list/virtualgrouplist.js
index cb8d1b533..2dc5f97a5 100644
--- a/src/base/list/virtualgrouplist.js
+++ b/src/base/list/virtualgrouplist.js
@@ -27,6 +27,7 @@ BI.VirtualGroupList = BI.inherit(BI.Widget, {
 
     render: function () {
         var self = this, o = this.options;
+        
         return {
             type: "bi.vertical",
             items: [{
diff --git a/src/base/list/virtuallist.js b/src/base/list/virtuallist.js
index d5881b30b..7ae32143a 100644
--- a/src/base/list/virtuallist.js
+++ b/src/base/list/virtuallist.js
@@ -20,13 +20,13 @@ BI.VirtualList = BI.inherit(BI.Widget, {
     },
 
     init: function () {
-        var self = this;
         this.renderedIndex = -1;
         this.cache = {};
     },
 
     render: function () {
-        var self = this, o = this.options;
+        var self = this;
+
         return {
             type: "bi.vertical",
             items: [{
@@ -45,7 +45,7 @@ BI.VirtualList = BI.inherit(BI.Widget, {
                 ref: function () {
                     self.bottomBlank = this;
                 }
-            }],
+            }]
         };
     },