diff --git a/js/lib/drag/main.js b/js/lib/drag/main.js
index 624b3d5..ff2b100 100644
--- a/js/lib/drag/main.js
+++ b/js/lib/drag/main.js
@@ -97,8 +97,8 @@ define(['yua'], function(){
                 dy = cst[5]
 
                 //滚动条的偏移
-                bst = document.body.scrollTop
-                bsl = document.body.scrollLeft
+                bst = document.documentElement.scrollTop
+                bsl = document.documentElement.scrollLeft
 
                 // 计算元素的offset值, 需要修正
                 ox = offset.left - dx - bsl