diff --git a/app/views/layouts/base_syllabus.html.erb b/app/views/layouts/base_syllabus.html.erb
index 37e77c5a8..45e77dbad 100644
--- a/app/views/layouts/base_syllabus.html.erb
+++ b/app/views/layouts/base_syllabus.html.erb
@@ -7,7 +7,7 @@
   <meta name="keywords" content="issue,bug,tracker" />
   <%= csrf_meta_tag %>
   <%= favicon %>
-  <%= stylesheet_link_tag 'jquery/jquery-ui-1.9.2', 'syllabus','css/common','css/public','css/structure','css/courses','prettify',:media => 'all' %>
+  <%= stylesheet_link_tag 'jquery/jquery-ui-1.9.2', 'syllabus','css/common','css/public','css/structure','css/courses','css/popup','prettify',:media => 'all' %>
   <%= stylesheet_link_tag 'rtl', :media => 'all' if l(:direction) == 'rtl' %>
   <%= javascript_heads %>
   <%= javascript_include_tag "bootstrap","avatars","course",'attachments','prettify','syllabus'%>
diff --git a/public/stylesheets/css/common.css b/public/stylesheets/css/common.css
index 06370489f..1ec98b1cf 100644
--- a/public/stylesheets/css/common.css
+++ b/public/stylesheets/css/common.css
@@ -319,7 +319,7 @@ a.linkGrey6:hover {color:#ffffff !important;}
 .td_w110{ width:110px;}
 
 .width165{width: 165px;}
-.width180{width: 180px;}
+.width180{width: 180px !important;}
 .width285{width: 285px;}
 .width255{width: 255px;}
 .width385{width: 385px;}
diff --git a/public/stylesheets/css/structure.css b/public/stylesheets/css/structure.css
index ef9b3bc3e..b2cba2483 100644
--- a/public/stylesheets/css/structure.css
+++ b/public/stylesheets/css/structure.css
@@ -356,7 +356,6 @@ a.menuGrey {color:#808080;}
 a.menuGrey:hover {color:#fe7d68;}
 .navSearchTypeBox {width:368px; height:35px; position:absolute; border:1px solid #e1e1e1; background-color:#ffffff; padding-left:10px; display:none; color:#3e3e3e; font-size:14px;}
 #navSearchAlert {display:none;}
-.none{display: none;}
 
 /*151228侧导航样式更新*/
 .menuSetting {background:url(../images/hwork_icon.png) -5px -303px no-repeat; display:inline-block; width:20px; height:20px;}