#menu {
position:relative;
width: 900px;
height: 25px;
margin:1em 10px 0 20px; 
font-family: arial, verdana, sans-serif;
background: #000;
float: none;
z-index:2;
}

#menu ul {
list-style: none;
margin: 0;
padding: 0;
width: 150px;
float: left;
}

#menu a, #menu h2 {
display: block;
border-width: 1px;
border-style: solid;
border-color: #ccc #888 #555 #bbb;
margin: 0;
padding: 2px 3px;
}

#menu li {position: relative;}

#menu ul ul {
position: absolute;
z-index:1;
}

#menu ul ul ul {
position: absolute;
top: 3px;
left: 100%;
}

div#menu ul ul,
div#menu ul li:hover ul ul,
div#menu ul ul li:hover ul ul
{display: none;}

div#menu ul li:hover ul,
div#menu ul ul li:hover ul,
div#menu ul ul ul li:hover ul

{display: block;}