// 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 getHeight(el) {
	return document.getElementById(el).offsetHeight;
}

function popUp(evt,oi) {
	if (DH) {
		var wp = pw(); 
		ds = fd(oi,1); 
		dm = fd(oi,0); 
		st = ds.visibility; 

		eh = parseInt(getHeight(oi));			

		if (dm.offsetWidth) 
			ew = dm.offsetWidth; 
		else if (dm.clip.width) 
				ew = dm.clip.width; 
				
		if (st == "visible" || st == "show") { 
			ds.visibility = "hidden";
		} else {

			var tttop = parseInt(mouseY(evt)); 
			var ttleft = parseInt(mouseX(evt)); 

			tttop -= (eh + 10);

			if (ttleft < 2) 
				ttleft = 2; 
			else if (ttleft + ew > wp) 
			     ttleft -= ew/2; 
		  if (!an) {
			  ttleft += 'px';
			  tttop += 'px';
		  } 
			ds.left = ttleft; 
			ds.top = tttop;
			ds.visibility = "visible";
		}
	}
}