diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index 2d7bf02b1..d39d8fe3b 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -173,6 +173,12 @@ class StudentWorkController < ApplicationController
       end
 
       if student_work.save
+        course_activity = CourseActivity.where("course_act_type='HomeworkCommon' and course_act_id =#{@homework.id}").first
+        course_activity.updated_at = Time.now
+        course_activity.save
+        user_activity = UserActivity.where("act_type='HomeworkCommon' and act_id =#{@homework.id}").first
+        user_activity.updated_at = Time.now
+        user_activity.save
         respond_to do |format|
           format.html {
             flash[:notice] = l(:notice_successful_create)
diff --git a/app/views/users/_course_journalsformessage.html.erb b/app/views/users/_course_journalsformessage.html.erb
index a2c4e4504..1fcd3797e 100644
--- a/app/views/users/_course_journalsformessage.html.erb
+++ b/app/views/users/_course_journalsformessage.html.erb
@@ -62,7 +62,8 @@
                       <% end %>
                       <%= format_time(comment.created_on) %>
                     </div>
-                    <div class="homepagePostReplyContent break_word list_style upload_img"><%= comment.notes.html_safe %></div>
+                    <div class="homepagePostReplyContent break_word list_style upload_img" id="reply_content_<%= user_activity_id %>">
+                      <%= comment.notes.html_safe %></div>
                     <% fetch_user_leaveWord_reply(comment).each do |reply| unless fetch_user_leaveWord_reply(comment).nil? %>
                         <div class="recall">
                           <div class="homepagePostReplyPortrait">
@@ -83,7 +84,8 @@
                                 <% end %>
                                 <%= format_time reply.created_on %>
                               </div>
-                              <div class="homepagePostReplyContent break_word list_style upload_img"><%= reply.notes.html_safe %></div>
+                            <div class="homepagePostReplyContent break_word list_style upload_img" id="reply_content_<%= user_activity_id %>">
+                              <%= reply.notes.html_safe %></div>
                               <div class="cl"></div>
                           </div>
                           <div class="cl"></div>
diff --git a/app/views/users/_course_message.html.erb b/app/views/users/_course_message.html.erb
index 65bf644bc..8ec605567 100644
--- a/app/views/users/_course_message.html.erb
+++ b/app/views/users/_course_message.html.erb
@@ -87,7 +87,7 @@
                       <% end %>
                       <%= format_time(reply.created_on) %>
                     </div>
-                    <div class="homepagePostReplyContent break_word list_style upload_img">
+                    <div class="homepagePostReplyContent break_word list_style upload_img" id="reply_content_<%= user_activity_id %>">
                       <%= reply.content.html_safe %>
                     </div>
                   </div>
diff --git a/app/views/users/_course_news.html.erb b/app/views/users/_course_news.html.erb
index f5d570fe0..4b5b73ceb 100644
--- a/app/views/users/_course_news.html.erb
+++ b/app/views/users/_course_news.html.erb
@@ -60,7 +60,8 @@
                       <% end %>
                       <%= format_time(comment.created_on) %>
                     </div>
-                    <div class="homepagePostReplyContent break_word list_style upload_img"><%= comment.comments.html_safe %></div>
+                    <div class="homepagePostReplyContent break_word list_style upload_img" id="reply_content_<%= user_activity_id %>">
+                      <%= comment.comments.html_safe %></div>
                   </div>
                   <div class="cl"></div>
                 </li>
diff --git a/app/views/users/_project_issue.html.erb b/app/views/users/_project_issue.html.erb
index bb3c4cb54..2c429a93f 100644
--- a/app/views/users/_project_issue.html.erb
+++ b/app/views/users/_project_issue.html.erb
@@ -97,7 +97,7 @@
                       <% end %>
                       <%= format_time(reply.created_on) %>
                     </div>
-                    <div class="homepagePostReplyContent break_word list_style upload_img">
+                    <div class="homepagePostReplyContent break_word list_style upload_img" id="reply_content_<%= user_activity_id %>">
                       <% if reply.details.any? %>
                           <% details_to_strings(reply.details).each do |string| %>
                               <p><%= string %></p>
@@ -133,17 +133,3 @@
 
   </div>
 </div>
-<script type="text/javascript">
-    $(function(){
-        var images=$("div#activity_description_<%= user_activity_id %>").find("img");
-        if (images.length>0) {
-            for (var i=0; i<images.length; i++){
-                var image=$(images[i]);
-                var element=$("<a></a>").attr("href",image.attr('src'));
-                image.wrap(element);
-            }
-        }
-        $('#activity_description_<%= user_activity_id %> a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false});
-    });
-
-</script>
\ No newline at end of file
diff --git a/app/views/users/_project_message.html.erb b/app/views/users/_project_message.html.erb
index 9be1145ff..ead43d7e4 100644
--- a/app/views/users/_project_message.html.erb
+++ b/app/views/users/_project_message.html.erb
@@ -74,7 +74,8 @@
                       <% end %>
                       <%= format_time(reply.created_on) %>
                     </div>
-                    <div class="homepagePostReplyContent break_word list_style upload_img"><%= reply.content.html_safe %></div>
+                    <div class="homepagePostReplyContent break_word list_style upload_img" id="reply_content_<%= user_activity_id %>">
+                      <%= reply.content.html_safe %></div>
                   </div>
                   <div class="cl"></div>
                 </li>
diff --git a/app/views/users/_user_activities.html.erb b/app/views/users/_user_activities.html.erb
index ea9c572d9..29752121f 100644
--- a/app/views/users/_user_activities.html.erb
+++ b/app/views/users/_user_activities.html.erb
@@ -37,6 +37,26 @@
 
             $(function() {
                 init_activity_KindEditor_data(<%= user_activity.id%>,null,"87%");
+                var description_images=$("div#activity_description_<%= user_activity.id %>").find("img");
+                if (description_images.length>0) {
+                    for (var i=0; i<description_images.length; i++){
+                        var image=$(description_images[i]);
+                        var element=$("<a></a>").attr("href",image.attr('src'));
+                        image.wrap(element);
+                    }
+                }
+                $('#activity_description_<%= user_activity.id %> a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false});
+
+                var reply_images=$("div#reply_content_<%= user_activity.id %>").find("img");
+                if (reply_images.length>0) {
+                    for (var i=0; i<reply_images.length; i++){
+                        var image=$(reply_images[i]);
+                        var element=$("<a></a>").attr("href",image.attr('src'));
+                        image.wrap(element);
+                    }
+                }
+                $('#reply_content_<%= user_activity.id %> a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false});
+
             });
         </script>
         <% act= user_activity.act unless user_activity.act_type == "ProjectCreateInfo" %>