.nav{width: 100%; height: 46px; margin: 0; background-image: url(dh.png) ;}
.nav_yj{width: 1000px; margin: 0 auto; height: 46px; }
.nav_yj li{float: left;display: inline; text-align: center; line-height: 46px; position: relative; width: 142px; z-index: 999;}
.nav_yj li.on{background: #721d9f; height: 46px; line-height: 46px;}
.nav_yj li a{font-size: 14px; color: #fff; display: block; font-weight: bold;}
.nav_yj li.on a,.nav_yj li.on a:hover{color: #fff;}

.nav_ej{position: absolute; top: 46px; left: 0; display: none; background: #721d9f; float: left; width: 100%; z-index: 1000;}
.nav_ej li{text-align: center; background: none; line-height: 46px; float: left;display: inline; width: 100%; display: inline;}
.nav_ej li a{font-size: 14px; color: #fff; display: block; background: none; padding: 0; font-weight: bold;}
.nav_ej li a:hover{background: #ab53d9;}
.box{width: 100%; height: 46px; margin: 0; background-image: url(dh.png);}
/*nav*/
#nav{margin:0 auto;width:1000px;height:46px;/* z-index: 990; */font-size: 16px; color: #ffffff; font-weight: bold;}
#nav .jquery_out{float:left;line-height:46px;display:block;text-align:center;color:#fff;font-size:16px;
width:116px;}


#nav .mainlevel{float:left;width:116px;/*IE6 only*/text-align: center;position: relative; z-index: 999;}
#nav .mainlevel a{font-size: 14px; color: #ffffff; font-weight: bold;text-decoration:none;line-height:46px;display:block;padding:0;width:116px;}
#nav .mainlevel .on{background: #ab53d9; color:#fff;}
#nav .mainlevel a:hover,#nav .mainlevel a.cur{color:#fff;text-decoration:none;background-color: #ab53d9;min-width:116px;}
#nav .mainlevel ul{display:none;position:absolute;top: 45px;left: 0; z-index: 999;}
#nav .mainlevel li{font-size: 16px; color: #ffffff; font-weight: bold;background:#721d9f;min-width:116px;/*IE6 only*/text-align: center;}
.a1{ width: 140px !important;}
.b1{ width: 150px !important;white-space:nowrap !important;}
#nav.b1 a:hover,#nav .b1 a{width: 150px !important;}