diff --git a/app/views/users/_apply_homework.html.erb b/app/views/users/_apply_homework.html.erb
index cd906fc8f..ddfac69cc 100644
--- a/app/views/users/_apply_homework.html.erb
+++ b/app/views/users/_apply_homework.html.erb
@@ -1,16 +1,28 @@
 <div>
   <div class="ni_con">
     <%= form_tag(apply_for_homework_user_path(:id=>User.current.id,:homework_id=>homework.id), :multipart => true,:remote => true,:name=>"apply_for_homework_form",:id=>'apply_for_homework_form') do %>
-        <h2>请求分享</h2>
-        <p>
-          请求说明（可选）：
-          <textarea type="text" name="content" id="apply_content" class="apply_content mt10" style="outline:none;"></textarea>
+        <h2>申请分享</h2>
+        <p style="color: #000;">
+          申请说明（必选）：
+          <textarea type="text" name="content" id="apply_content" placeholder="请附言，以增加分享的成功机率。" class="apply_content mt10" style="outline:none;"></textarea>
         </p>
+        <span class="c_red ml5 f12" style="display: none" id="apply_content_notice">为增加分享的成功机率，请务必填写申请说明。</span>
         <div class="ni_btn">
-          <a href="javascript:" class="tijiao" onclick="$('#apply_for_homework_form').submit();" style="margin-bottom: 20px; margin-left: 60px; color: #fff">
+          <a href="javascript:" class="tijiao" onclick="submit_apply_homework();" style="margin-bottom: 20px; margin-left: 60px; color: #fff">
             确&nbsp;&nbsp;定
           </a>
         </div>
     <% end %>
   </div>
-</div>
\ No newline at end of file
+</div>
+<script type="application/javascript">
+  var first_click_apply = true;
+  function submit_apply_homework(){
+      if($.trim($("#apply_content").val()) == ""){
+          $("#apply_content_notice").show();
+      } else if(first_click_apply) {
+          first_click_apply = false;
+          $('#apply_for_homework_form').submit();
+      }
+  }
+</script>
\ No newline at end of file