// 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";
		
		}
	}
}