function caratteristiche(chars, divid) {
i=0;
if (typeof(divid)=='undefined') {
	document.getElementById("tab"+chars[0]).style.display = 'block';
	document.getElementById("sel"+chars[0]).className = 'selected';
}else{
while(i<chars.length) {
	document.getElementById("tab"+chars[i]).style.display = 'none';
	document.getElementById("sel"+chars[i]).className = 'off';
i++;
   }
        document.getElementById("tab"+divid).style.display = 'block';
        document.getElementById("sel"+divid).className = 'selected';
   }
}