function showHint(ev,id)
{
  MouseX = ev.clientX + document.body.scrollLeft;
  MouseY = ev.clientY + document.body.scrollTop;
  obj = document.getElementById("hint[" + id + "]");
  obj.style.top = MouseY - 100;
  obj.style.left = MouseX + 10;
  obj.style.visibility = "visible";
}

function hideHint(id) {
  document.getElementById("hint[" + id + "]").style.visibility="hidden";
}