<!DOCTYPE html>
<html>
  <head>
      <script type="text/javascript">
          function check_storage() {
              var elem = document.getElementById("status");
              try {
                  localStorage.qute_test = "foo";
                  elem.innerHTML = "working";
              } catch (e) {
                  elem.innerHTML = "not working";
              }
          }
      </script>
  </head>
  <body onload="check_storage()">
    <p>Local storage status: <span id="status">checking...</span></p>
  </body>
</html>