title: html5 window.localStorage.getItemItem get keys that start with
body: <p>How could I use</p>
  <p><code>window.localStorage.getItem();</code></p>
  <p>to specify items in localstarage that start with the string <code>'QQ'</code>. In my case the key can be: QQ + 3 digits, so I just need to specify that it starts with the string <code>'QQ'</code>...?</p>