.m_banner{ background:#fff;height:409px; position:relative;}
.m_banner .banner{height:409px;width:100%; position:absolute;top:0;left:0; background-position:center top;}
.banner_ctrl{ height:100px;width:960px;position:absolute;top:50%;left:50%;margin:-50px 0 0 -480px;z-index:2;}
.banner_ctrl a{ display:block;width:30px;height:100px; position:absolute; opacity:.1;filter: alpha(opacity=10);
-moz-opacity:0.1;}
.banner_ctrl a.prev{left:-30px;}
.banner_ctrl a.next{right:-30px; background-position:-30px 0;}
.m_banner .banner .main_c{ position:relative;z-index:10;height:602px;}