// tool tips

// 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
// see http://javascript.about.com/library/bltip1.htm for and explanation

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";
				}
		}
}