function PopUp(page,largeur,hauteur) {
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  window.open(page,"_popup","top="+top+",left="+left+",width="+largeur+",height="+hauteur+",menubar=no,scrollbars=no,statusbar=no,resize=yes");
}