#menu { width: 100px; background: #eee; } 

#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: #ccc #888 #555 #bbb;
  margin: 0; padding: 2px 3px; 
}

#menu h2 { color: #FF8635; background: #96D12C; text-transform: uppercase; } 

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

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

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

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

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