diff --git a/app/views/student_work/_evaluation_un_group.html.erb b/app/views/student_work/_evaluation_un_group.html.erb
index 75614a909..05cc7c5c1 100644
--- a/app/views/student_work/_evaluation_un_group.html.erb
+++ b/app/views/student_work/_evaluation_un_group.html.erb
@@ -5,7 +5,7 @@
       </div>
       <div id="about_hwork_<%= student_work.id %>"></div>
 
-      <div id="group_member_work_<%= student_work.id%>" class="undis">
+      <div id="group_member_work_<%= student_work.id%>">
         <%= render :partial => 'group_member_work', :locals => {:student_work => student_work} %>
       </div>
   <% end %>
diff --git a/app/views/student_work/_evaluation_un_group_work.html.erb b/app/views/student_work/_evaluation_un_group_work.html.erb
index 5ce2545e7..25b42e5f6 100644
--- a/app/views/student_work/_evaluation_un_group_work.html.erb
+++ b/app/views/student_work/_evaluation_un_group_work.html.erb
@@ -1,5 +1,5 @@
 <div class="sy_courses_open f14 fontGrey3">
-  <span class="icons_sy_close fl mr5" title="点击展开/收起详情" style="cursor: pointer;"></span>
+  <span class="icons_sy_open fl mr5" title="点击展开/收起详情" style="cursor: pointer;"></span>
         <span class="fl" style="width:280px;">
         <span class="hidden fl" style="max-width:240px;"><%=student_work.name %></span>
         <span class="fontGrey2 ml5 fl">