// 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 pop(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;

      tv = mouseY(evt) + 20;
      lv = mouseX(evt) - (ew/4);

      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";
   }
}


function unpop(evt, oi)
{
   if (DH)
   {
      ds = fd(oi, 1);
      ds.visibility = "hidden";
   }
}