function apri( targetId ){
		target = document.getElementById( targetId );
				target.style.display = "block";
}
function chiudi( targetId ){
		target = document.getElementById( targetId );
				target.style.display = "none";
}
function aprichiudi( targetId ){
  if (document.getElementById){
		target = document.getElementById( targetId );
			if (target.style.display == "none"){
				target.style.display = "block";
			} else {
				target.style.display = "none";
				
			}
	}
}