function rollingShow(divName) {
	var divActive = getActiveDiv(document);
	document.getElementById(divActive).style.visibility = 'hidden';
	document.getElementById(divActive).style.display = 'none';
	document.getElementById(divName).style.visibility = 'visible';
	document.getElementById(divName).style.display = 'block';
}

function rollingSuperShow(divName) {
	var divActive = getActiveDiv(window.parent.document);

	window.parent.document.getElementById(divActive).style.visibility = 'hidden';
	window.parent.document.getElementById(divActive).style.display = 'none';
	window.parent.document.getElementById(divName).style.visibility = 'visible';
	window.parent.document.getElementById(divName).style.display = 'block';
	
}

function getActiveDiv(doc) {
	var ret = 'homepage';
	target = doc.getElementById('play');
	if (target.style.display == "block") {ret = 'play';}
	target = doc.getElementById('barzellette');
	if (target.style.display == "block") {ret =  'barzellette';}
	target = doc.getElementById('gallery');
	if (target.style.display == "block") {ret =  'gallery';}
	target = doc.getElementById('guestbook');
	if (target.style.display == "block") {ret =  'guestbook';}
	target = doc.getElementById('amici');
	if (target.style.display == "block") {ret =  'amici';}
	target = doc.getElementById('pubblicita');
	if (target.style.display == "block") {ret =  'pubblicita';}
	target = doc.getElementById('pirle');
	if (target.style.display == "block") {ret =  'pirle';}
	target = doc.getElementById('vignetta');
	if (target.style.display == "block") {ret =  'vignetta';}
	target = doc.getElementById('trimone');
	if (target.style.display == "block") {ret =  'trimone';}
	target = doc.getElementById('homepage');
	if (target.style.display == "block") {ret =  "homepage";}
	
	return ret;
}