diff --git a/app/views/files/_course_list.html.erb b/app/views/files/_course_list.html.erb
index 8af369558..a90d47b5a 100644
--- a/app/views/files/_course_list.html.erb
+++ b/app/views/files/_course_list.html.erb
@@ -14,9 +14,10 @@
   </p>
 </div>
 <div class="cl"></div>
+<div class="for_img_thumbnails">
 <% curse_attachments.each do |file| %>
     <div class="re_con_box">
-      <div class=" ">
+      <div class="">
         <%= link_to_attachment file, :download => true,:text => truncate(file.filename,length: 35, omission: '...'), :title => file.filename+"\n"+file.description.to_s, :style => "overflow: hidden; white-space: nowrap;text-overflow: ellipsis;",:class => "c_dblue f_14 f_b f_l" %>
         <% if User.current.logged? %>
           <% if (is_course_teacher(User.current,@course) || file.author_id == User.current.id) && course_contains_attachment?(@course,file) %>
@@ -50,6 +51,7 @@
       <div class="cl"></div>
     </div><!---re_con_box end-->
 <% end %>
+</div>
 <ul class="wlist">
   <%= pagination_links_full @obj_pages, @obj_count, :per_page_links => false, :remote => @is_remote, :flag => true%>
 </ul>
diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index 18afa7f67..5d2423238 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -632,7 +632,12 @@ function img_thumbnails() {
     if (/\.(jpg|png|gif|bmp|jpeg|PNG|BMP|GIF|JPG|JPEG)$/.test(href_value)) {
       $(element).colorbox({rel:'nofollow'});
     }
-
+  });
+  $('.for_img_thumbnails').find('a').each(function(index, element) {
+    var href_value = $(element).attr('href');
+    if (/\.(jpg|png|gif|bmp|jpeg|PNG|BMP|GIF|JPG|JPEG)$/.test(href_value)) {
+      $(element).colorbox({rel:'nofollow'});
+     }
   });
 }
 $(document).ready(img_thumbnails);