http://www.benmarshall.me/interaction-points-jquery-plugin/

121-1.html

<div class="points"></div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="jquery.interactionPoints.js"></script>
<script>
$(function() {
  // Initialize the User Interaction Points jQuery Plugin
  $('.points').interactionPoints({
    url:          'your-script-here.php', // The URL the points get posted to, required
    container:    window,                 // The element to track interactions on
    value:        1,                      // The amount of points each second is worth
    post:         30,                     // Number of seconds to post points to script
    data:         { 'userID': 1 },        // Additional data you want passed to the php script (ie. userID)
    debug:        1,                      // Enables/diables debugging
    action_limit: 300                     // Number of seconds until the user is timeout after their last key press
  });
});
</script>