Hi Jay,
You almost had it. The property you need is the scrollTop and scrollLeft 
for the body tag. So the code would be:


window.onscroll = function() {
  var iLeftRelative = document.body.scrollLeft;
  var iTopRelative = document.body.scrollTop;
  var divDisplay = document.getElementById('divCommands');
  divDisplay.style.left = iLeftRelative + 10;
  divDisplay.style.top = iTopRelative + 10;
}

Good luck
Philip