diff --git a/app/views/student_work/_student_work_list.html.erb b/app/views/student_work/_student_work_list.html.erb
index 4f891f4c8..371334be1 100644
--- a/app/views/student_work/_student_work_list.html.erb
+++ b/app/views/student_work/_student_work_list.html.erb
@@ -45,38 +45,40 @@
 <% end%>
 <script type="text/javascript">
   $(function(){
-      <% work=@homework.student_works.where("user_id = ?",User.current.id).first %>
-      <% unless @is_evaluation %>
-          <% if @homework.homework_type == 2 %>
-              $("#about_hwork_<%= work.id%>").html("<%= escape_javascript(render :partial => 'programing_work_show',:locals => {:work =>work,:score =>student_work_score(work,User.current),:student_work_scores => work.student_works_scores.order("updated_at desc")}) %>");
+      <% if !@is_evaluation && !@is_teacher %>
+          <% work=@homework.student_works.where("user_id = ?",User.current.id).first %>
+          <% unless work.nil? %>
+              <% if @homework.homework_type == 2 %>
+                  $("#about_hwork_<%= work.id%>").html("<%= escape_javascript(render :partial => 'programing_work_show',:locals => {:work =>work,:score =>student_work_score(work,User.current),:student_work_scores => work.student_works_scores.order("updated_at desc")}) %>");
 
-              var program_name = "text/x-csrc";
-              var language = <%= @homework.language %>;
-              if (language == 1) {
-                  program_name = 'text/x-csrc';
-              } else if(language==2){
-                  program_name = 'text/x-c++src';
-              }else if(language==3){
-                  program_name = 'text/x-cython';
-              } else if(language==4){
-                  program_name = 'text/x-java';
-              }
-              var editor = CodeMirror(document.getElementById("work-code"), {
-                          mode: {name: program_name,
-                              version: 2,
-                              singleLineStringErrors: false},
-                          lineNumbers: true,
-                          indentUnit: 2,
-                          matchBrackets: true,
-                          readOnly: true,
-                          value: $("#work-src").text()
-                      });
-          <% elsif @homework.homework_type == 1 %>
-              $("#about_hwork_<%= work.id%>").html("<%= escape_javascript(render :partial => 'show',:locals => {:work => work, :score =>student_work_score(work,User.current),:student_work_scores => work.student_works_scores.order("updated_at desc")}) %>");
-          <% elsif @homework.homework_type == 3 %>
-              <% pro = @homework.student_work_projects.where(:user_id => User.current.id).first %>
-              <% if pro && pro.student_work_id == work.id %>
+                  var program_name = "text/x-csrc";
+                  var language = <%= @homework.language %>;
+                  if (language == 1) {
+                      program_name = 'text/x-csrc';
+                  } else if(language==2){
+                      program_name = 'text/x-c++src';
+                  }else if(language==3){
+                      program_name = 'text/x-cython';
+                  } else if(language==4){
+                      program_name = 'text/x-java';
+                  }
+                  var editor = CodeMirror(document.getElementById("work-code"), {
+                              mode: {name: program_name,
+                                  version: 2,
+                                  singleLineStringErrors: false},
+                              lineNumbers: true,
+                              indentUnit: 2,
+                              matchBrackets: true,
+                              readOnly: true,
+                              value: $("#work-src").text()
+                          });
+              <% elsif @homework.homework_type == 1 %>
                   $("#about_hwork_<%= work.id%>").html("<%= escape_javascript(render :partial => 'show',:locals => {:work => work, :score =>student_work_score(work,User.current),:student_work_scores => work.student_works_scores.order("updated_at desc")}) %>");
+              <% elsif @homework.homework_type == 3 %>
+                  <% pro = @homework.student_work_projects.where(:user_id => User.current.id).first %>
+                  <% if pro && pro.student_work_id == work.id %>
+                      $("#about_hwork_<%= work.id%>").html("<%= escape_javascript(render :partial => 'show',:locals => {:work => work, :score =>student_work_score(work,User.current),:student_work_scores => work.student_works_scores.order("updated_at desc")}) %>");
+                  <% end %>
               <% end %>
           <% end %>
           $('#score_<%= work.id%>').peSlider({range: 'min'});