gistfile1.js

// if localStorage is present, use that
if (('localStorage' in window) && window.localStorage !== null) {

  // easy object property API
  localStorage.wishlist = '["Unicorn","Narwhal","Deathbear"]';

} else {

  // without sessionStorage we'll have to use a far-future cookie
  //   with document.cookie's awkward API :(
  var date = new Date();
  date.setTime(date.getTime()+(365*24*60*60*1000));
  var expires = date.toGMTString();
  var cookiestr = 'wishlist=["Unicorn","Narwhal","Deathbear"];'+
                  ' expires='+expires+'; path=/';
  document.cookie = cookiestr;
}