function retaille()
{
  var divMenuextensible = document.getElementById('menuextensible');
  var divContenu = document.getElementById('contenu');
  
  heightdivMenuextensible = divMenuextensible.offsetHeight;
  heightdivContenu = divContenu.offsetHeight;
  
  if (heightdivContenu <= 391)
  {
    document.getElementById('menuextensible').style.height = 87 +'px';
    document.getElementById('contenu').style.height = 391 +'px';
  }
  else
  {
    document.getElementById('menuextensible').style.height = heightdivContenu - 391 + 87 +'px';
  }
}

function retaille2exist()
{
  if(typeof window.retaille2!='undefined'){retaille2();}
}