diff --git a/app/views/news/show.html.erb b/app/views/news/show.html.erb
index 6e5888363..846be063f 100644
--- a/app/views/news/show.html.erb
+++ b/app/views/news/show.html.erb
@@ -3,3 +3,15 @@
 <% elsif @course %>
     <%= render :partial => 'course_show', locals: {course: @course} %>
 <% end %>
+<script type="text/javascript">
+  $(function(){
+    $("#add_comment_form").submit(function(){
+      if($("#comment").val() == ''){
+        alert('请输入评论内容');
+        return false;
+      }
+      $(this)[0].submit();
+      //return true;
+    });
+  })
+</script>