div#librerie{
	width: 500px;
	height: 250px;
	font-family:  Arial, Verdana, "Time New Romans", sans-serif;
	font-size: 90%;
	text-align: center;
}

div#librerie ul{
	list-style-type: none;
	margin: 0;
	padding: 0;
}

div#librerie li{
	margin: 0px 0px 0px 0px;
	padding:0;
}

div#librerie a{
	display: block;
	width: 100px;
	line-height: 20px;
	text-decoration: none;
	background-color: #000;
	color: white;
	float:none;
	margin-right: 200px;
	}

div#librerie a:hover{
	background-color: #4E7B46;
	color: #fff;
}

div#librerie li#activelink a,div#navigation li#activelink a:hover{
  background-color: red;
	color: #fff;
	}