如何在启用“私密浏览”的iPhone上检测用户？

My jquerymobile App requires the use of localStorage and sessionstorage e.t.c, I've been giving a prompt to users without cookie support and telling them to enable cookies, but if a user has private browsing enable, this create cookie test I'm doing doesn't work and they just get a still erroneous screen, does anyone know how I could test if the user has private browsing enabled?My jquerymobile App requires the use of localSt