function mostra(id,sp1,sp2)
{
	el = document.getElementById(id);
	if (el.style.display=="block")
	{
		el.style.display="none";
	}
	else
	{
		el.style.display="block";
	}
	
	el=document.getElementById(sp1);
	el.style.display="none";
	el=document.getElementById(sp2);
	el.style.display="inline";
	
}