function mostrar(idtabla){
	document.getElementById("fabricacion").style.display="none";
	document.getElementById("controles").style.display="none";
	document.getElementById("garantias").style.display="none";
	document.getElementById("introduccion").style.display="none";
	document.getElementById(idtabla).style.display="block";
}

function mostrar2(idtabla){
	document.getElementById("quees").style.display="none";
	document.getElementById("funcion").style.display="none";
	document.getElementById("conduccion").style.display="none";
	document.getElementById(idtabla).style.display="block";
}