// 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 popUp(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); 
                lv = mouseX(evt) - (ew/4) - 200; 
            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";
            }
        }
    }