ul#nav {
	font: 12px Verdana, Arial, Helvetica, sans-serif;
}

ul#nav, ul#nav li ul {
	margin: 0;
	padding: 0;
	list-style: none;
	width: 100%; 
}
	
ul#nav li {
	width: 100%; 
	margin: 0 0 -1px -1px;
	position: relative;
}
	
ul#nav li ul {
	position: absolute;
	left: 100%; 
	top: 0;
	display: none;
}

ul#nav li a {
	display: block;
	text-decoration: none;
	color: #fff;
	padding: 0.25em 0.5em 0.25em 0.75em;
	background-color: #ff0000;
	border: 1px solid #fff;
}
ul#nav li a:hover {background-color: #00cc00;}

ul#nav li:hover ul { display: block; } 
ul#nav li:hover ul li ul { display: none; }
ul#nav li:hover ul li:hover ul { display: block; }