diff --git a/app/views/homework_common/index.html.erb b/app/views/homework_common/index.html.erb
index 6a3528e51..9a1497fa7 100644
--- a/app/views/homework_common/index.html.erb
+++ b/app/views/homework_common/index.html.erb
@@ -43,7 +43,7 @@
     <div id="menu_r" class="NewsBannerName" style="margin-bottom: -10px;">
       <ul class="menu_r b_w" style="padding-left: 0px; margin-top: -5px;">
         <li>
-          <a href="javascript:void(0);" class="parent" style="font-size:16px; color:#4b4b4b; font-weight: normal; padding-left: 0px;">作业</a>
+          <a href="javascript:void(0);" class="menu_arrow" style="font-size:16px; color:#4b4b4b; font-weight: normal; padding-left: 0px;">作业</a>
           <ul>
             <% @homework_commons.each_with_index do |homework_common,index |%>
                 <li class="pr10">
diff --git a/public/stylesheets/courses.css b/public/stylesheets/courses.css
index b4d07f64f..60cb491e0 100644
--- a/public/stylesheets/courses.css
+++ b/public/stylesheets/courses.css
@@ -736,6 +736,8 @@ div#menu_r ul  a.parent  {background: url(../images/item.png) -30px -30px no-rep
 div#menu_r ul  a.parent:hover  {background: url(../images/item.png) -30px -60px no-repeat;}
 div#menu_r ul ul a.parent  {background: url(../images/item.png) -20px 6px no-repeat;}
 div#menu_r ul ul a.parent:hover  {background: url(../images/item.png) -20px -11px no-repeat;}
+.menu_arrow  {background: url(../images/sort_desc.png) 40px 17px no-repeat;  width:50px; overflow:hidden; white-space: nowrap; text-overflow:ellipsis;}
+.menu_arrow:hover  {background: url(../images/sort_asc.png) 40px 17px no-repeat;}
 /* menu::level1 */
 div#menu_r a { padding: 5px 12px 0 10px;line-height: 30px; color: #fff;}
 /*div#menu_r li { background: url(images/main-delimiter.png) 98% 4px no-repeat; }*/