#menu { color: #482757; background: #fff; width: 150px; margin-left: 10px; } 

#menu ul { /* remove bullets and list indents */
list-style: none;
margin: 0;
padding: 0;
}

/* style, color and size links and headings to suit */
#menu a, #menu h2 { color: #482757; font: bold 11px/16px Arial, Helvetica, sans-serif; display: block; margin: 0; padding: 2px 3px; }

#menu h2 { color: #fff; font-family: tahoma, arial, helvetica; background: #201c59; text-transform: uppercase; }

#menu a { color: #201c59; font-family: tahoma, arial, helvetica; background: #efefef; text-decoration: none; }

#menu a:hover { color: #b09e00; font-family: tahoma, arial, helvetica; background: #fff; }

#menu li {
/* make the list elements a containing block for the nested lists */
position: relative;
list-style-image: none;
} 

#menu ul ul ul {
position: absolute;
top: 0;
left: 100%; /* to position them to the right of their containing block */
width: 100%; /* width is based on the containing block */
}

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;}