#menu {
width: 155px;
background: #ff9933;
}
 
#menu ul {
list-style: none;
margin: 0;
padding: 0;
}
 
#menu a, #menu h2 {
font: bold 16px Verdana;
display: block;
border-width: 1px;
border-style: solid;
border-color: #ccc #888 #555 #bbb;
margin: 0;
padding: 2px 3px;
}
 
#menu h2 {
color: #fff;
background: #cc6600;
text-transform: uppercase;
text-decoration: underline;
}
 
#menu a {
color: #fff;
background: #ff9933;
text-decoration: none;

}
 
#menu a:hover {
color: #000;
background: #fff;
}
 
#menu li {
position: relative;
background: #FFF;
}
 
#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,
div#menu ul ul li:hover 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 li:hover ul li:hover ul
{display: block;}
 

<!--[if IE]>
media="screen">
 #menu ul li {float: left; width: 100%;}
<![endif]-->
<!--[if lt IE 7]>
body {
behavior: url(csshover3.htc);
font-size: 100%;
} 
#menu ul li {float: left; width: 100%;}
#menu ul li a {height: 1%;} 
 
#menu a, #menu h2 {
font: bold 0.7em/1.4em arial, helvetica, sans-serif;
} 
<![endif]-->