diff --git a/source/Ox.UI/Ox.UI.js b/source/Ox.UI/Ox.UI.js
index aef05fc8..0be39d66 100644
--- a/source/Ox.UI/Ox.UI.js
+++ b/source/Ox.UI/Ox.UI.js
@@ -417,7 +417,10 @@ Ox.load.UI = function(options, callback) {
                 width;
             width = inner[0].offsetWidth;
             outer.css({overflow: 'scroll'});
-            return 1 + width - (inner[0].offsetWidth == width ? outer[0].clientWidth : inner[0].offsetWidth);
+            width = 1 + width - (inner[0].offsetWidth == width
+                ? outer[0].clientWidth : inner[0].offsetWidth);
+            outer.remove();
+            return width;
         })();
         //@ Ox.UI.getBarSize <s> get bar size by name  
         // fixme: the follwing should be deprecated