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<html>
  <head>
    <title>Parenscript tutorial: Increment a session value</title>
    <script type='text/javascript'>
      function greetingCallback() {
        alert('The value was 15 and now it\'s 16');
        return location.reload(true);
      };
    </script>
  </head>
  <body>
    <h2>Parenscript tutorial: Increment a session value</h2>
    <a href='#' onclick='greetingCallback();'>Click here to increment the value</a>
  </body>
</html>