ul,ol,li {list-style:none; padding:0px; margin:0px;}
/*µ¼º½*/
.mdh{z-index:2000;float:left; text-align:center; }
.menu{_overflow:hidden; z-index:1000; }
.menu a{ float:left;font-size:16px; color:#949494;  background:none; }
.menu li{font-size:14px;float:left; display:block;}
.menu li:hover{ display:block; background:url(../lltu/dhbj.jpg) center center no-repeat;}
.menu li:hover a{color:#fff ;}
.menu li.no_sub:hover{background:url(../ybtu/dhbj.jpg) center center no-repeat; color:#fff ;}
.menu ul{width:100%; position:absolute;left:0px; top:-999em;z-index:99999;display:none; color:#949494; height:auto; overflow:hidden; text-align:left;}
.menu li:hover ul{top:126px;display:block}


/*IE6*/
.menu li.hover{ display:block; background:url(../ybtu/dhbj.jpg) center center no-repeat; color:#FFF; }
.menu li.hover a{color:#fff;}
.menu li.hover ul{top:126px;display:block}