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<script language="JavaScript">
var immagine = 'ani.gif';
var code = '';
if (document.all)
{
  code += '<SPAN ID="pointer" STYLE="position: absolute; left: -100">';
  code += '<IMG NAME="pointerImg" SRC="' + immagine + '" BORDER=0>';
  code += '</SPAN>';
}
else
{
  code += '<LAYER ID="pointer" POSITION="absolute" LEFT="-100">';
  code += '<IMG ID="pointerImg" SRC="' + immagine + '" BORDER=0>';
  code += '</LAYER>';
}
document.write(code);
if(document.layers) document.captureEvents(Event.MOUSEMOVE);
  document.onmousemove = coordinate;

function coordinate(e)
{
  // Calcola le coordinate del mouse
  if (document.layers)
  {
    document.layers.pointer.left = e.pageX + 8;
    document.layers.pointer.top = e.pageY + 18;
  }
  if (document.all)
  {
    pointer.style.left = event.clientX + document.body.scrollLeft + 8;
    pointer.style.top = event.clientY + document.body.scrollTop + 18;
  }
  return true;
}
</script>