function scrivi(testo) {
	document.getElementById('dicitura').innerHTML="      "+testo;
}
var time=setTimeout('null',1);
var dir=1;

function fading()
{		
	clearTimeout(time);
	if ((dir==1 && n<100) || (dir==-1 && n>0))
	{
		document.getElementById('submenu').style.filter = 'alpha(opacity='+n+')';
		document.getElementById('submenu').style.MozOpacity = n/100;
		document.getElementById('submenu').style.opacity = n/100;
		n+=(dir*5);
		time = setTimeout('fading()', 16);
	}
	else 
	{
		document.getElementById('submenu').style.filter = 'alpha(opacity='+(50+50*dir)+')';
		document.getElementById('submenu').style.MozOpacity = .5+.5*dir;
		document.getElementById('submenu').style.opacity = .5+.5*dir;
	}
}

function aprisub() {
	if (document.getElementById('submenu').style.display!="block") document.getElementById('submenu').style.display="block";
	dir=1;
	time = setTimeout('fading()', 80);
}
function chiudisub() {
	dir=-1;
	time = setTimeout('fading()', 80);
}