if (navigator.userAgent.indexOf('iPhone') != -1 && ReadCookie("mobile_redirect") != "no") {
  if (confirm(message)) {
    document.location = url;
  }else{
    expiration_cookie=new Date;
    expiration_cookie.setMonth(expiration_cookie.getDay()+2);
    WriteCookie("mobile_redirect", "no", expiration_cookie);
  }
}