function OpenWindow(url,Name,largeur,hauteur,options) {
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  var MyPopup=window.open(url,Name,"top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
  MyPopup.focus();
  }