var myzone = document.getElementById('myzone');

var options = {
  container: myzone,       // Container of MultiFocus widget
  width: 1024,             // Width of container in PX (typically width of each image)
  height: 768,             // Height of container in PX (typically height of each image)
  preload: true,           // Define if the set of images should be preloaded
  speed: 100,              // Duration between two frames in ms
  images: [                // All images of the set in the right focal length order
    // ...
    {
      src: 'focus-01.jpg', // Image path
      focus: [             // All focus rectangles for this image
        {
          x1: 0.1,         // x1, y1 : Top left point of the sharp zone
          y1: 0.1,
          x2: 0.5,         // x2, y2 : Bottom right point of the sharp zone
          y2: 0.5
        },
        // ...             // Define other sharp zone for this image
      ]
    }
    // ...
  ]
};

var multifocus = new MultiFocus(options);

multifocus.init();