function setPOD(str){
  var today = new Date();
  var expiry = new Date(today.getTime() + 28 * 24 * 60 * 60 * 1000); // plus 28 days
  var expireVal = expiry.toGMTString();
  document.cookie = 'POD' + "=" + str + "; path=/; domain=.apple.com; expires=" + expireVal;
}