#menu
{
    width: 800px;
    height: 200px;
    margin: auto;
    background: #eee;
}

#menu ul
{
    list-style: none;
    margin: auto;
    padding: 0;
    display: table;
}

#menu li
{
    /*float: left;*/
    position: relative;
    display: table-cell;
}

#menu li a
{
    /*display: block; не работает в ie6*/
    display: inline-block;
    height: 50px;
    line-height: 50px;
    padding: 0 20px;
    background: #69c;
    color: white;
    text-transform: uppercase;
    text-decoration: none;
}

#menu li a:hover
{
    background: #369;
}

#menu li ul
{
    background: red;
    display: none;
    position: absolute;
    left: 0;
}

#menu li:hover ul
{
    display: block;
}

#menu li:hover ul li
{
    display: table-row;
}

#menu li li{
    float: none;
}

#menu li li a{
    display: block;
    background: #f60;
    white-space: nowrap;
}

#menu li li a:hover{
    display: block;
    background: #d30;
}