function mostraMenu(id) 
{ 
   var menu = document.getElementById(id); 
   menu.style.display='block'; 
} 

function nascondiMenu(id) 
{ 
   var menu = document.getElementById(id);  
   menu.style.display='none'; 
} 

function toggleDiv(DivName) 
{ with (document.getElementById(DivName).style) 
	{ 
		if (display == "none") 
		display = ""; 
		else display = "none"; 
		
		return false;
	}
} 

function visualizza_traveller()
{
	var num = document.getElementById('questa').value;
	for (var i=1; i<=12; i++)
	{
		for (var r=1;r<=6;r++)
		{
			var divo = "riga"+r+i;
			if (i <= num ) document.getElementById(divo).style.display = "";
			else
			document.getElementById(divo).style.display = "none";
		}
		
	}
	
	
}