div.centro {
	background-color: #FFFFFF;
	height: 500px;
	width: 746px;
	margin-top: -250px;
	margin-left: -373px;
	position: absolute;
	left: 50%;
	top: 50%;
	border: 10px solid #FFFFFF;
}
body {
	background-color: #333333;
}
#100per100 {
	height: 100%;
	width: 100%;
	margin: 0px;
}