body{
	margin:0px;
	height: 100%;
}
html{
	height: 100%;
}
#contenitore {
	width: 920px;
	height: 550px;
	top: 50%;
	bottom: 50px;
	margin-top: -275px;
	margin-left: -460px;
	margin-right: auto;
	margin-bottom: auto;
}