diff --git a/app/views/homework_attach/edit.html.erb b/app/views/homework_attach/edit.html.erb
index 40e97c9bd..26d2a02a0 100644
--- a/app/views/homework_attach/edit.html.erb
+++ b/app/views/homework_attach/edit.html.erb
@@ -37,7 +37,7 @@
 </head>
 
 <body>
-<div class="container">
+<div class="container"  id="content">
   <div class="Newwork">
     <div id="tb_" class="tb_">
       <ul>
@@ -75,7 +75,6 @@
             <%= f.text_area :description, :rows => 8, :name => "homework_description", :class => "w620",
                             :maxlength => 3000, :placeholder => "最多3000个汉字"  %>
           </p>
-          <div class="cl"></div>
           <p>
             <label style="float: left;">
               &nbsp;&nbsp;&nbsp;添加附件&nbsp;&nbsp;&nbsp;&nbsp;：
