.zona_no_imprimir {

	visibility: hidden;
	display: none;
}

#encabezado {
	visibility: hidden;
	display: none;
}

#menu {
	visibility: hidden;
	display: none;
}

#footer {
	visibility: hidden;
	display: none;
}

#contenido{
    text-align: left;
    margin: auto;
}