function OpenPromoBanner()
{
  if (document.getElementById('promos'))
    {
      document.getElementById('flashPhotosGallery').style.visibility='hidden'; 
      document.getElementById('contenu').style.visibility='hidden'; 
      document.getElementById('promos').style.visibility='visible'; 
      setTimeout(ClosePromoBanner, 30000);
    }
  else
    {
      document.getElementById('flashPhotosGallery').style.visibility='visible'; 
    };
};
function ClosePromoBanner()
{
document.getElementById('flashPhotosGallery').style.visibility='visible'; 
document.getElementById('contenu').style.visibility='visible'; 
document.getElementById('promos').style.visibility='hidden'; 
};