// 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 popUp(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; 
		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; 
			if (!an) {
				lv += 'px';
				tv += 'px';
			}
			ds.left = lv;
			ds.top = tv;
			ds.visibility = "visible";
		}
	}
}