.menu{
    font-family:arial, sans-serif;
    width:720px;
    height:20px;
    position:relative;
    font-size:11px;
    z-index:20
}
.menu ul li a, .menu ul li a:visited{
    display:block;
    text-decoration:none;
    color:#000;
    width:141px;
    height:20px;
    text-align:center;
    color:#fff;
    border:1px solid #fff;
    background:#ddd;
    line-height:20px;
    font-size:11px;
    overflow:hidden
}
.menu ul{
    padding:0;
    margin:0;
    list-style:none
}
.menu ul li{
    float:left;
    position:relative}
.menu ul li ul{
    display:none
}
.menu ul li:hover a{
    color:#fff;
    background:#ddd
}
.menu ul li:hover ul{
    display:block;
    position:absolute;
    top:21px;
    left:0;
    width:105px
}
.menu ul li:hover ul li a{
    display:block;
    background:#ddd;
    color:#000
}
.menu ul li:hover ul li a:hover{
    background:#B4B4B4;
    color:#000
}