body {
	margin-top: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
	margin-left: 0px;
	background-color: #FFFFFF;
}
#encabezado {
	background-color: #FFFFFF;
	width: 900px;
	margin-right: auto;
	margin-left: auto;
	height: 180px;
}
#centro {
	background-color: #FFFFFF;
	width: 900px;
	margin-right: auto;
	margin-left: auto;
}