var posX = 0;
var posY = 0;
function fGetXY(e) {
	if (!e) var e = window.event;
	if (e.pageX || e.pageY)	{
		posX = e.pageX;
		posY = e.pageY;
    return;
	}	else if (e.clientX || e.clientY)	{
		posX = e.clientX;
		posY = e.clientY;
	}
  if (window.pageYOffset) {
    posX += window.pageXOffset;
    posY += window.pageYOffset;
  } else if (document.documentElement && document.documentElement.scrollTop) {
    posX += document.documentElement.scrollLeft;
    posY += document.documentElement.scrollTop;
  } else if (document.body) {
    posX += document.body.scrollLeft;
    posY += document.body.scrollTop;
  }
}
document.onmousemove=fGetXY;

function showDiv(div_id) {
  document.getElementById(div_id).style.top = posY - 50 +'px';
  document.getElementById(div_id).style.left = posX + 25 + 'px';
  document.getElementById(div_id).style.display = 'block';
}
function hideDiv(div_id) {
  document.getElementById(div_id).style.display = 'none';
}