diff --git a/app/views/bids/_new_homework_form.html.erb b/app/views/bids/_new_homework_form.html.erb
index 6df06b1a6..4f502b1f6 100644
--- a/app/views/bids/_new_homework_form.html.erb
+++ b/app/views/bids/_new_homework_form.html.erb
@@ -26,9 +26,9 @@
       <input type="checkbox" name="bid[open_anonymous_evaluation]" id="bid_open_anonymous_evaluation" <%= bid.open_anonymous_evaluation == 1 ? 'checked' : ''%>  >
       <div class="cl"></div>
     </li>
-    <li class="ml9">
+    <li class="ml9" id="bid_evaluation_num_li"  style="display: <%= bid.open_anonymous_evaluation == 1 ? 'block' : 'none'%>;">
       <label><span class="c_red">*</span>&nbsp;<%= l(:field_evaluation_num)%>&nbsp;&nbsp;：</label>
-      <input  type="text" name="bid[evaluation_num]" id="bid_evaluation_num" class="hwork_input02" onkeyup="regex_evaluation_num();" value="<%= bid.evaluation_num%>">
+      <input  type="text" name="bid[evaluation_num]" id="bid_evaluation_num"  class="hwork_input02" onkeyup="regex_evaluation_num();" value="<%= bid.evaluation_num%>">
       <span><%= l(:label_evaluation_description)%></span>
       <p id="bid_evaluation_num_span" class="c_red" style="padding-left: 90px;"></p>
     </li>
diff --git a/public/javascripts/course.js b/public/javascripts/course.js
index 5e1e138bb..bb4127f9a 100644
--- a/public/javascripts/course.js
+++ b/public/javascripts/course.js
@@ -215,11 +215,11 @@ $(function(){
     $("#bid_open_anonymous_evaluation").click(function(){
         if($("#bid_open_anonymous_evaluation").attr("checked") == "checked")
         {
-            $("#bid_evaluation_num").slideDown();
+            $("#bid_evaluation_num_li").slideDown();
         }
         else
         {
-            $("#bid_evaluation_num").slideUp();
+            $("#bid_evaluation_num_li").slideUp();
         }
     });
 });