/*首页*/
.m_banner{ background:#fff;height:500px; position:relative; margin-top:-7px;}
.m_banner .banner{height:500px;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{ 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; background:url(banner_ctrl.png) no-repeat;_background:url(banner_ctrl.jpg) no-repeat; position:absolute; opacity:.7;filter: alpha(opacity=70);
-moz-opacity:0.7;}
.banner_ctrl a.prev{left:-30px;}
.banner_ctrl a.next{right:-30px; background-position:-30px 0;}