CSS for a list converted to a menu

listmenu.css

nav ul {
  list-style-type: none;
	float:left;
	margin: .5em 0;
	padding:0;
}


nav ul li {
	list-style-type: none;
	list-style-image: none;
	list-style-position: outside;
	float:left;
	margin:0;
	padding:0;
}

nav ul li a {
	display: inline-block;
	background-color: gray;
	color: white;
	padding: .2em .5em;
	margin: 0 .5em .5em 0;
	text-decoration: none;
     -moz-border-radius: .2em;
    -webkit-border-radius: .2em;
    -khtml-border-radius: .2em;
    border-radius: .2em;

}
nav ul li a:hover {
	background-color: silver;
}