function UGCurtain(url)
{
      if (!PS.SignIn.isUserSignedIn) {
      if (!PS.SignIn.notifying) {
          PS.SignIn.addSignInNotification(function () { UGCurtain(url) });
          PS.SignIn.show("signin&signup", 2, 0);
          }
      }
      else
      {
          location.href=url;
      }
}