div#cabecera {
	visibility: hidden;
}
div#izquierda {
	visibility: hidden;
}
div#derecha {
	left: 0px;
	top: 0px;
	position: absolute;
	border: 0px;
}
div#pie {
	position: relative;
	top: 10px;
	visibility: hidden;
}
div#principal {
	border: 0px;
}