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

// permission is granted to use this javascript provided that the below code is not altered
var DH = 0;
var an = 0;
var al = 0;
var ai = 0;

if (document.getElementById) {
  ai = 1; 
  DH = 1;
} else {
  if (document.all) {
    al = 1; 
    DH = 1;
  } else { 
    browserVersion = parseInt(navigator.appVersion); 
    if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion == 4)) {
      an = 1; 
      DH = 1;
    }
  }
} 

function fd(oi, wS) {
  if (ai) return wS ? document.getElementById(oi).style:document.getElementById(oi); 
  if (al) return wS ? document.all[oi].style: document.all[oi]; 
  if (an) return document.layers[oi];
}

function pw() {
  return window.innerWidth != null? window.innerWidth: document.body.clientWidth != null? document.body.clientWidth:null;
}

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

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

function popUp(evt,oi) {
  if (DH) {
    var wp = pw();
    ds = fd(oi,1); 
    dm = fd(oi,0); 
    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) - 100; 
      lv = (mouseX(evt) - 300) ; 
      if (lv < 2) 
        lv = 2; 
      else if (lv + ew > wp) 
        lv -= ew/2; 
      if (!an) {
        lv += 'px';tv += 'px';
      } 
      ds.left = lv; 
      ds.top = tv; 
      ds.visibility = "visible";
    }
  }
}