// JavaScript Document
function showTT(id) {
  tooltip = document.getElementById(id);
  tooltip.style.display = "block";
}

function hideTT() {
  tooltip.style.display = "none";
}

document.onmousemove = updateTT;
 
function updateTT(e) {
  if (tooltip != null && tooltip.style.display == 'block') {
    x = (e.pageX ? e.pageX : window.event.x) + tooltip.offsetParent.scrollLeft - tooltip.offsetParent.offsetLeft;
    y = (e.pageY ? e.pageY : window.event.y) + tooltip.offsetParent.scrollTop - tooltip.offsetParent.offsetTop;
    tooltip.style.left = (x + 0) + "px";
    tooltip.style.top   = (y + 25) + "px";
  }
}