function showMostViewedProduct(boxId, selectorId)
{
  $$('.containerProductPiuVisti').each(function(s) {
    s.hide();
  });
  $$('.smallButton').each(function(s) {
    s.setStyle({border: '1px solid #CCC'});
  });
  $(boxId).show();
  
  $(selectorId).down().setStyle({border: '1px solid #900'});
}