diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 0db12e244..232d46e2e 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1090,7 +1090,9 @@ module ApplicationHelper
   end
 
   def back_url_hidden_field_tag
-    url = back_url
+    #add by xianbo 
+    url = nil
+    #leave the url remain
     hidden_field_tag('back_url', url, :id => nil) unless url.blank?
   end