iPad Version Detection

<script>
    window.ondevicemotion = function(event) {
      if (navigator.platform.indexOf("This device is an iPad") != -1) {
          var version = 1;
          if (event.acceleration) version += window.devicePixelRatio;
          document.getElementById('info').innerHTML = version;
      }
      window.ondevicemotion = null;
  }
</script>

<p>iPad <span id="info">- This device is not iPad!</span></p>