diff --git a/app/controllers/account_controller.rb b/app/controllers/account_controller.rb
index cf39898fe..af8487868 100644
--- a/app/controllers/account_controller.rb
+++ b/app/controllers/account_controller.rb
@@ -276,10 +276,18 @@ class AccountController < ApplicationController
       set_autologin_cookie(user)
     end
     call_hook(:controller_account_success_authentication_after, {:user => user })
-    #by young
-#    redirect_back_or_default my_page_path
-    redirect_back_or_default User.current
-#    redirect_to User.current
+
+    code = /\d*/
+    #根据home_url生产正则表达式
+    eval("code = " + "/^" + home_url.gsub(/\//,"\\\/") + "\\\/*(welcome)?\\\/*(\\\/index\\\/*.*)?\$/")
+    if code=~params[:back_url]
+      redirect_to user_activities_path(user)
+    else
+      #by young
+      #redirect_back_or_default my_page_path
+      redirect_back_or_default User.current
+      #redirect_to User.current
+    end
   end
 
   def set_autologin_cookie(user)
diff --git a/app/controllers/bids_controller.rb b/app/controllers/bids_controller.rb
index 206421e5d..1ae04fa08 100644
--- a/app/controllers/bids_controller.rb
+++ b/app/controllers/bids_controller.rb
@@ -18,6 +18,8 @@ class BidsController < ApplicationController
   helper :attachments
   include AttachmentsHelper
   include ApplicationHelper
+  include BidsHelper
+
   helper :projects
   helper :words
   helper :welcome
@@ -503,10 +505,12 @@ class BidsController < ApplicationController
   #删除已提交的项目作业（不删项目）
   def delete
     binding_project = params[:binding_project]
-    if BidingProject.delete(binding_project)
-      redirect_to project_for_bid_path
-    else
-      redirect_to 403;
+    if can_delete_project_homework(BidingProject.find(binding_project),User.current)
+      if BidingProject.delete(binding_project)
+        redirect_to project_for_bid_path
+      else
+        redirect_to 403;
+      end
     end
   end
   ## 新建留言
diff --git a/app/helpers/bids_helper.rb b/app/helpers/bids_helper.rb
index bd39d6c28..38b32e692 100644
--- a/app/helpers/bids_helper.rb
+++ b/app/helpers/bids_helper.rb
@@ -151,4 +151,8 @@ module BidsHelper
     tmp
   end
 
+  def can_delete_project_homework bind_project,current_user
+    current_user.id == bind_project.user.id || current_user.admin
+  end
+
 end
\ No newline at end of file
diff --git a/app/views/bids/_list_projects.html.erb b/app/views/bids/_list_projects.html.erb
index e51314c48..ce24a4457 100644
--- a/app/views/bids/_list_projects.html.erb
+++ b/app/views/bids/_list_projects.html.erb
@@ -154,9 +154,9 @@
 						<% end %>
 						</td>
                         <td align="right">
-                          <% if  b_project.user.id == User.current.id || User.current.id == b_project.bid.author.id
+                          <% if can_delete_project_homework b_project,User.current
                           %>
-                            <%= link_to image_tag('delete.png'),{ :action => "delete",  :binding_project => b_project}, :confirm => "Are you sure?"  %>
+                            <%= link_to image_tag('delete.png'),{ :action => "delete",  :binding_project => b_project}, :confirm => l(:text_are_you_sure)  %>
                           <% end %>
                         </td>
 					</tr>