function despliega(Id) {
	document.getElementById(Id + "+").style.display = "none";
	document.getElementById(Id + "-").style.display = "inline";
	document.getElementById(Id).style.display = "block";
}

function repliega(Id) {
	document.getElementById(Id + "+").style.display = "inline";
	document.getElementById(Id + "-").style.display = "none";
	document.getElementById(Id).style.display = "none";
}