function lang_show()
{
  var el = document.getElementById('lingue');
  el.style.visibility = 'visible';
  var el2 = document.getElementById('SceltaLingua2');
  el2.className = 'SceltaLingua2';
}

function lang_hide()
{
  var el = document.getElementById('lingue');
  el.style.visibility = 'hidden';
  var el2 = document.getElementById('SceltaLingua2');
  el2.className = 'SceltaLingua';
}