function ShowDiv(NumLivello){

	if (NumLivello != "ItemAtoC") document.getElementById("ItemAtoC").style.display="none";
	if (NumLivello != "ItemDtoF") document.getElementById("ItemDtoF").style.display="none";
	if (NumLivello != "ItemHtoK") document.getElementById("ItemHtoK").style.display="none";
	if (NumLivello != "ItemLtoR") document.getElementById("ItemLtoR").style.display="none";
	if (NumLivello != "ItemS") document.getElementById("ItemS").style.display="none";
	if (NumLivello != "ItemTtoZ") document.getElementById("ItemTtoZ").style.display="none";
					
	
	eval('document.getElementById("' + NumLivello + '").style.display="block"')

}