// 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) + 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";
         }
     }
 }