.n_ul {position: absolute; visibility:hidden; left: 0;  background-color:#ded0a2; border:solid 1px #B59E6B; text-align:left; width:167px;z-index:999;}
.n_li {display: block; font-family:Arial, Helvetica, sans-serif; font-size:10px; color:#846D3E;  padding:4px 0px 4px 3px; border-bottom:solid 1px #fff; width:165px; text-decoration:none;z-index:999;}
.n_li:hover {display:block; background-color:#B59E6B; color:#fff;z-index:999; }

#nav {position:relative; width:940px; top:0px;z-index:999;}
#ul_2 {left:140px;z-index:999;}
#ul_3{left:245px;z-index:999;}