function PopupCentrer(page,largeur,hauteur,options) {
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}
function open2win(lien1,lien2) { 
window.open(lien1,accueil,[]); 
window.open(lien2,ssmenu,[]); 
}