html, body {

	width: 100%;

	margin: 0;

	padding: 0;

	text-align: center;

}



div#contenitore {

	width: 900px;

	height: 600px;

	margin: 0 auto;

	padding: 0;
	border:0px solid black;

	position: absolute;

	top: 50%;

	left: 50%;

	margin: -280px 0 0 -375px;

	text-align: center;

}