#menu { width:150px; background: #b1cbb1; } 

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

#menu a, #menu h2 {
  font: bold 11px/16px arial, helvetica, sans-serif;
  display: block;
  border-width: 1px; border-style: solid; border-color: #b1cbb1 #b1cbb1 #b1cbb1 #b1cbb1;
  margin: 0; padding: 2px 3px; }

#menu h2 { color: #ffffff; background: #006600; text-transform: uppercase; } 

#menu a { color: #000; background: #c9dfc8; text-decoration: none; } 

#menu a:hover { color: #a00; background: #b1cbb1; } 

#menu li { position: relative; }

#menu ul ul ul {position: absolute; top: 0; left: 100%; width: 100%; }

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

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