// Extended Tooltip Javascript
// copyright 9th August 2002, 3rd July 2005, 24th August 2008
// by Stephen Chapman, Felgall Pty Ltd

// permission is granted to use this javascript provided that the below code is not altered
function pw() {
  return window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth
}

function mouseX(evt) {
  return evt.clientX ? evt.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft) : evt.pageX;
}

function mouseY(evt) {
  return evt.clientY ? evt.clientY + (document.documentElement.scrollTop || document.body.scrollTop) : evt.pageY;
}

function toolTip(evt,oi) {
  if (document.getElementById) {
    var wp = pw(); 
    dm = document.getElementById(oi); 
    ds = dm.style; 
    st = ds.visibility; 
    if (dm.offsetWidth) ew = dm.offsetWidth; 
    else if (dm.clip.width) ew = dm.clip.width; 
    if (st == "visible" || st == "show") {
      ds.visibility = "hidden"; 
    } else {
      tv = mouseY(evt) + 20; 
      lv = mouseX(evt) - (ew/4);
      if (lv < 2) lv = 2;
      else if (lv + ew > wp) lv -= ew/2;
      lv += 'px';
      tv += 'px'; 
      ds.left = lv;
      ds.top = tv;
      ds.visibility = "visible";
    }

  }
}