function swapMenu(targetId){
  
  if (document.getElementById)
        {
        target = document.getElementById(targetId);
        
            if (target.style.display == "none")
                {
                target.style.display = "";
				document.getElementById('normale').id = 'aperto';
				document.getElementById('areavolontari_ancora').id = 'areavolontari_ancora2';
                } 
            
            else 
                {
                target.style.display = "none";
				document.getElementById('aperto').id = 'normale';
				document.getElementById('areavolontari_ancora2').id = 'areavolontari_ancora';
                }
                
        }
}

function swap(targetId){
  
  if (document.getElementById)
        {
        target = document.getElementById(targetId);
        
            if (target.style.display == "none")
                {
                target.style.display = "";
                } 
            
            else 
                {
                target.style.display = "none";
                }
                
        }
}