#header {
	height: 280px;
	width: 1000px;
	margin-right: auto;
	margin-left: auto;
	background-image: url(imagenes/fondo.png);
}
#content {
	height: auto;
	width: 1000px;
	background-color: #278ec9;
	margin-right: auto;
	margin-left: auto;
}