diff --git a/app/views/exercise/_student_table.html.erb b/app/views/exercise/_student_table.html.erb
index bdfd2c96f..8d7fe7a8a 100644
--- a/app/views/exercise/_student_table.html.erb
+++ b/app/views/exercise/_student_table.html.erb
@@ -2,10 +2,10 @@
   <tr class="b_grey hworkH30">
     <th class="hworkList30 pl5 pr5"><span class="c_dark f14 fb">序号</span></th>
     <th class="hworkList50">&nbsp;&nbsp;</th>
-    <th class="hworkList60"><span class="c_dark f14 fb">姓名</span></th>
-    <th class="hworkList80"><span class="c_dark f14 fb">学号</span></th>
-    <th class="hworkList80"><span class="c_dark f14 fb">班级</span></th>
-    <th width="230">&nbsp;&nbsp;</th>
+    <th class="hworkList130"><span class="c_dark f14 fb">姓名</span></th>
+    <th class="hworkList130"><span class="c_dark f14 fb">学号</span></th>
+    <th class="hworkList130"><span class="c_dark f14 fb">班级</span></th>
+    <th width="60">&nbsp;&nbsp;</th>
     <th class="hworkList130">
       <%= link_to "时间",'',:class => "c_dark f14 fb" ,:remote => true%>
     </th>
@@ -17,19 +17,19 @@
   <% @exercise_users_list.each_with_index do |exercise, index|%>
       <tr class="hworkListRow" id="student_work_<%= exercise.id%>">
         <td class="pl5 pr5" style="text-align:center;"><%=index + 1 %></td>
-        <td class="hworkPortrait pr10 float-none">
+        <td class="hworkPortrait float-none">
           <%= link_to(image_tag(url_to_avatar(exercise.user),:width =>"40",:height => "40",:style => "display:block;", :class => "mt15"),user_activities_path(exercise.user)) %>
         </td>
-        <td class="hworkStName student_work_<%= exercise.id%>" title="姓名" id="student_name_<%= exercise.id%>" style="cursor:pointer;">
+        <td class="hworkStName130 pr10 student_work_<%= exercise.id%>" title="姓名" id="student_name_<%= exercise.id%>" style="cursor:pointer;">
           <%=exercise.user.show_name %>
         </td>
-        <td class="hworkStID student_work_<%= exercise.id%> pl15 pr10 float-none" title="学号" id="student_id_<%= exercise.id%>" style="cursor:pointer;">
-          <span class="hidden fl" style="width:80px;"><%= exercise.user.user_extensions.nil? ? "--" : exercise.user.user_extensions.student_id%></span>
+        <td class="hworkStID130 pr10 student_work_<%= exercise.id%> float-none" title="学号" id="student_id_<%= exercise.id%>" style="cursor:pointer;">
+          <span class="hidden fl" style="width:130px;"><%= exercise.user.user_extensions.nil? ? "--" : exercise.user.user_extensions.student_id%></span>
         </td>
-        <td class="hworkStID student_work_<%= exercise.id%> float-none" title="班级"  id="student_class_<%= exercise.id%>" style="cursor:pointer;">
+        <td class="hworkStID130 student_work_<%= exercise.id%> float-none" title="班级"  id="student_class_<%= exercise.id%>" style="cursor:pointer;">
           --
         </td>
-        <td width="230">&nbsp;</td>
+        <td width="60">&nbsp;</td>
         <td class="hworkList130 c_grey">
           <% if exercise.created_at%>
               <%= Time.parse(format_time(exercise.created_at)).strftime("%m-%d %H:%M")%>&nbsp;
@@ -45,13 +45,13 @@
       </tr>
 
       <script type="text/javascript">
-          $(".student_work_<%= exercise.id%>").mouseenter(function(){
-              $("#work_click_<%= exercise.id%>").show();
-          }).mouseleave(function(){
-              $("#work_click_<%= exercise.id%>").hide();
-          }).mouse;
           $(function(){
               <% if Time.parse(h(@exercise.end_time)).strftime("%Y-%m-%d-%H-%M-%S") <= Time.now.strftime("%Y-%m-%d-%H-%M-%S") %>
+              $(".student_work_<%= exercise.id%>").mouseenter(function(){
+                  $("#work_click_<%= exercise.id%>").show();
+              }).mouseleave(function(){
+                  $("#work_click_<%= exercise.id%>").hide();
+              }).mouse;
               $("#student_name_<%= exercise.id%>,#student_id_<%= exercise.id%>,#student_class_<%= exercise.id%>").on('click',function() {
                   window.location.href = '<%=show_student_result_exercise_path(@exercise,:user_id => exercise.user_id) %>';
               });