.nav{ float:left;width:575px; height:39px; z-index:9999; margin-left:20px; margin-top:25px;}

/* 全局公共样式的设定 */
#jsddm{ padding:0; margin:0; }
#jsddm img{ border:0px;}
#jsddm li{float:left;list-style: none;height:39px;}
#jsddm li a{color:#000; font-family:"Microsoft Yahei";}
#jsddm li a:hover{color:#38a2db;}

.jsnvas a{display:block; text-align:center; text-decoration:none;height:39px; line-height:39px; color:#000;font-size:14px; font-weight:bold;}

.jsnvas,.jsnvas a:hover,.jsnvas3{color:#000;height:39px;}
#jsddm li ul{margin: 0;padding: 0;position: absolute;visibility: hidden;z-index:100;}
#jsddm li ul li{float:left;display: inline;}
#jsddm li ul li a{padding:0px 10px 0px 10px;color:#b3b4b4;text-align:left;font-size:14px;text-align:center;height:29px; line-height:29px; background:#eeefef; font-weight:normal;}
#jsddm li ul li a:hover{color:#38a2db;}