function mousePosition(e)
{
 mouseX = (e.pageX) ? e.pageX : document.body.scrollLeft+event.clientX;
 //mouseY = (e.pageX) ? e.pageY : document.body.scrollTop+event.clientY;
 mouseY = (e.pageX) ? e.pageY : document.documentElement.scrollTop+event.clientY;
}

if (navigator.appName == "Microsoft Internet Explorer")
     document.attachEvent('onmousemove', mousePosition);
else document.addEventListener('mousemove', mousePosition, false);

function popupVisible(a)
{
  elem = document.getElementById('windowpopup'+a);
  elem.style.position   = 'absolute';
  elem.style.visibility = 'visible';
  elem.style.display    = 'block';
  elem.style.left = (mouseX-10)+'px';
  elem.style.top  = (mouseY+20)+'px';
}

function popupExit(a)
{
  var elem = document.getElementById('windowpopup'+a);
  elem.style.visibility = 'hidden';
  elem.style.display    = 'none';
}