#menu {
width: 100%;
background: #6b6b6b;
float: left;
}
 body {
behavior: url(assets/csshover2.htc);
}
#menu ul {
list-style: none;
margin: 0;
padding: 0;
width: 9em;
float: left;
}

#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: #fff;
background: #6b6b6b;
text-transform: uppercase;
}

#menu a {
color: #000;
background: #999999;
text-decoration: none;
}

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

#menu li {
position: relative;
}

#menu ul ul {
position: absolute;
z-index: 500;
}

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

div#menu ul ul,
div#menu ul li:hover ul ul,
div#menu ul ul li:hover ul ul
{display: none;
width: 120%;}

div#menu ul li:hover ul,
div#menu ul ul li:hover ul,
div#menu ul ul ul li:hover ul
{display: block;
width: 120%;}
<!--[if IE]>
<style type="text/css" media="screen">
body {
behavior: url(assets/csshover2.htc);
font-size: 100%;
}

#menu ul li {float: left; width: 100%;}
#menu ul li a {height: 1%;} 

#menu a, #menu h2 {
font: bold .9em/1.8em Verdana, Arial, Helvetica, sans-serif;
}
</style>
<![endif]-->