diff --git a/app/views/boards/_course_show.html.erb b/app/views/boards/_course_show.html.erb
index ef16d0c23..6cd7f75c5 100644
--- a/app/views/boards/_course_show.html.erb
+++ b/app/views/boards/_course_show.html.erb
@@ -71,7 +71,9 @@
 
           $(function () {
               init_activity_KindEditor_data(<%= topic.id%>, null, "87%");
-              var description_images=$("div#activity_description_<%= topic.id %>").find("img");
+              showNormalImage('activity_description_<%= topic.id %>');
+              //showNormalImage('reply_content_<%#= topic.id %>');
+              /*var description_images=$("div#activity_description_<%#= topic.id %>").find("img");
               if (description_images.length>0) {
                   for (var i=0; i<description_images.length; i++){
                       var image=$(description_images[i]);
@@ -79,9 +81,9 @@
                       image.wrap(element);
                   }
               }
-              $('#activity_description_<%= topic.id %> a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false});
+              $('#activity_description_<%#= topic.id %> a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false});
 
-              var reply_images=$("div#reply_content_<%= topic.id %>").find("img");
+              var reply_images=$("div#reply_content_<%#= topic.id %>").find("img");
               if (reply_images.length>0) {
                   for (var i=0; i<reply_images.length; i++){
                       var image=$(reply_images[i]);
@@ -89,7 +91,7 @@
                       image.wrap(element);
                   }
               }
-              $('#reply_content_<%= topic.id %> a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false});
+              $('#reply_content_<%#= topic.id %> a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false});*/
           });
       </script>
       <% if topic %>
diff --git a/app/views/messages/_course_show.html.erb b/app/views/messages/_course_show.html.erb
index 1611bc725..8f6af1021 100644
--- a/app/views/messages/_course_show.html.erb
+++ b/app/views/messages/_course_show.html.erb
@@ -25,6 +25,8 @@
     }
     $(function() {
         init_activity_KindEditor_data(<%= @topic.id%>,null,"85%");
+        /*showNormalImage('activity_description_<%#= topic.id %>');
+        showNormalImage('reply_content_<%#= topic.id %>');*/
     });
 </script>
 <div class="postRightContainer ml10" onmouseover="$('#message_setting_<%= @topic.id%>').show();" onmouseout="$('#message_setting_<%= @topic.id%>').hide();">
@@ -73,7 +75,7 @@
       </div>
       <div class="postDetailDate mb5"><%= format_time( @topic.created_on)%></div>
       <div class="cl"></div>
-      <div class="memo-content upload_img break_word" style="word-break: break-all; word-wrap:break-word;margin-bottom: 0px !important;" >
+      <div class="memo-content upload_img break_word" id="message_description_<%= @topic.id %>" style="word-break: break-all; word-wrap:break-word;margin-bottom: 0px !important;" >
         <%= @topic.content.html_safe%>
       </div>
       <div class="cl"></div>
@@ -97,6 +99,7 @@
     </div>
     <div class="" id="reply_div_<%=  @topic.id %>">
       <% @replies.each_with_index  do |reply,i| %>
+
           <div class="homepagePostReplyContainer" onmouseover="$('#reply_edit_menu_<%= reply.id%>').show();" onmouseout="$('#reply_edit_menu_<%= reply.id%>').hide();">
             <div class="homepagePostReplyPortrait">
               <%= link_to image_tag(url_to_avatar(reply.author), :width => 33,:height => 33), user_path(reply.author) %>
@@ -109,7 +112,9 @@
                     <%= link_to reply.try(:author).try(:realname), user_path(reply.author_id,:host=>Setting.host_user), :class => "newsBlue mr10 f14" %>
                 <% end %>
               </div>
-              <div class="homepagePostReplyContent upload_img break_word"><%= reply.content.html_safe%></div>
+              <div class="homepagePostReplyContent upload_img break_word" id="reply_message_description_<%= reply.id %>">
+                <%= reply.content.html_safe%>
+              </div>
               <div style="margin-top: -7px; margin-bottom: 5px">
                 <%= format_time(reply.created_on) %>
                 <div class="fr" id="reply_edit_menu_<%= reply.id%>" style="display: none">
diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index 8e5e38ee4..4ab267c1a 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -952,3 +952,16 @@ $(document).ready(function () {
         $("pre").addClass("break_word");
     }
 });
+
+//点击图片即显示大图
+function showNormalImage(id) {
+    var description_images=$('div#'+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);
+        }
+    }
+    $('#'+id+' a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false});
+}