var fen = null ;
function fenetre(url) { 
if ((fen == null) || (fen.closed))
  {
  fen=window.open (url,'fenetre','width=490,height=450,directories=no,status=no,scrollbars=auto,resize=no,menubar=no,left=20,top=20,toolbar=no');
  }
else
  {
  fen.location = url;
  fen.focus();
  }
}
var fen = null ;

var fena = null ;
function fenetrea(url) { 
if ((fena == null) || (fena.closed))
  {
  fena=window.open (url,'fenetrea','width=420,height=280,directories=no,status=no,scrollbars=auto,resize=no,menubar=no,left=20,top=20,toolbar=no');
  }
else
  {
  fena.location = url;
  fena.focus();
  }
}
var fena = null ;