<sky>
<div id="log">Ready</div>
<script>
function logTouchEvent(evt) {
  var message = "type=" + event.type;
  if (evt.touches && evt.touches.length > 0)
    message += " x=" + evt.touches[0].clientX + " y=" + evt.touches[0].clientY;
  document.getElementById("log").textContent = message;
}

document.documentElement.addEventListener("touchstart", logTouchEvent);
document.documentElement.addEventListener("touchmove", logTouchEvent);
document.documentElement.addEventListener("touchend", logTouchEvent);
document.documentElement.addEventListener("touchcancel", logTouchEvent);
</script>
</sky>