function changeTab(act,layOn,isSubYears){
	var chg = act.parentNode.parentNode;
	var list = act.parentNode.parentNode.parentNode.parentNode.getElementsByTagName('div');
	for (i=0; i<(list.length-1); i++) {
		if (list[i].className == 'tabSxOn') list[i].className = 'tabSxOff'
		else if (list[i].className == 'tabDxOn') list[i].className = 'tabDxOff';
		if ((list[i].className == 'tabOn') || (list[i].className == 'tabOff')) {
			if (list[i].className == 'tabOn') list[i].className = 'tabOff'
		}
	}
	if ((chg.className == 'tabOn') || (chg.className == 'tabOff')) {
		chg.className = 'tabOn';
		lato = chg.parentNode.getElementsByTagName('div');
		for (s=0; s<(lato.length); s++){
			if ((lato[s].className == 'tabSxOff') || (lato[s].className == 'tabSxOn')) {
				lato[s].className = 'tabSxOn';
			} else if ((lato[s].className == 'tabDxOff') || (lato[s].className == 'tabDxOn')) {
				lato[s].className = 'tabDxOn';
			}
		}
	}
	var elencoTab = $$('div.contTab');
	if (elencoTab.length==0)
		var elencoTab = $$('div.contTab2');
	for (var i=0;i<elencoTab.length;i++){
		elencoTab[i].style.display='none';
	}
	document.getElementById('tab'+layOn).style.display = 'block';
	if(isSubYears){
		for (i=0;i<$('btnYears').childNodes.length;i++){
			if($('btnYears').childNodes[i].tagName=='DIV') $('btnYears').childNodes[i].className="years"
		}
		document.getElementById('years_'+layOn).className = "years see"
	}
}