function capa(id) {
	document.getElementById('inicio').style.display="none";
	document.getElementById('contacto').style.display="none";
	document.getElementById('producto').style.display="none";
	document.getElementById('cantera').style.display="none";
	document.getElementById('factoria').style.display="none";
	document.getElementById('imagenes').style.display="none";

	document.getElementById(id).style.display="block";
}



function capa2(id) {
	document.getElementById('img_factoria').style.display="none";
	document.getElementById('img_cantera').style.display="none";

	document.getElementById(id).style.display="block";
}