function newTopMenuImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeTopMenuImage() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeTopMenuImage.arguments.length; i+=2) {
			document[changeTopMenuImage.arguments[i]].src = changeTopMenuImage.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadTopMenuImages(which) {
	if (document.images) {
		Historically_over = newTopMenuImage("/images/Historically-over.jpg");
		Historically_down = newTopMenuImage("/images/Historically-down.jpg");
		Actively_over = newTopMenuImage("/images/Actively-over.jpg");
		Actively_down = newTopMenuImage("/images/Actively-down.jpg");
		Culturally_over = newTopMenuImage("/images/Culturally-over.jpg");
		Culturally_down = newTopMenuImage("/images/Culturally-down.jpg");
		Naturally_over = newTopMenuImage("/images/Naturally-over.jpg");
		Naturally_down = newTopMenuImage("/images/Naturally-down.jpg");
		preloadFlag = true;
	}
}

function createUpperMenuImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function switchUpperMenuItem() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<switchUpperMenuItem.arguments.length; i+=2) {
			document[switchUpperMenuItem.arguments[i]].src = switchUpperMenuItem.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadUppermenu(which) {
	if (document.images) {
		Chapter_over = createUpperMenuImage("/images/Chapter-over.gif");
		Chapter_down = createUpperMenuImage("/images/Chapter-down.gif");
		DayTrips_over = createUpperMenuImage("/images/DayTrips-over.gif");
		DayTrips_down = createUpperMenuImage("/images/DayTrips-down.gif");
		Map_over = createUpperMenuImage("/images/Map-over.gif");
		Map_down = createUpperMenuImage("/images/Map-down.gif");
		Scrapbook_over = createUpperMenuImage("/images/Scrapbook-over.gif");
		Scrapbook_down = createUpperMenuImage("/images/Scrapbook-down.gif");
		Services_over = createUpperMenuImage("/images/Services-over.gif");
		Services_down = createUpperMenuImage("/images/Services-down.gif");
		Options_over = createUpperMenuImage("/images/options-over.gif");
		Options_down = createUpperMenuImage("/images/options-down.gif");
		preloadFlag = true;
	}
}

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
	if (init == true) with (navigator) {
		if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
			document.MM_pgW=innerWidth;
			document.MM_pgH=innerHeight;
			onresize=MM_reloadPage;
		}
	} else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH)  {
		location.reload();
	}
}
MM_reloadPage(true);

function MM_findObj(n, d) { //v4.01
	var p,i,x;
	if(!d) d=document;
	if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document;
		n=n.substring(0,p);
	}
	if(!(x=d[n])&&d.all) x=d.all[n];
	for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
	if(!x && d.getElementById) x=d.getElementById(n);
	return x;
}

function P7_hideDiv(evt) { //v1.3 by PVII
	var b,relT,mT = false; 
	if(document.layers)  {
		b = evt.target;
		if(b.p7aHide)  {
			b.visibility = "hidden";
		}else{
			routeEvent(evt);
		}
	}else if(document.all&&!window.opera){
		b = event.srcElement;
		while(b != null){
			if(b.tagName == "DIV" && b.p7ahD){
				mT = true;
				break;
			}
			b = b.parentElement;
		}
		if(!b.contains(event.toElement)){
			b.style.visibility = "hidden";
		}
 	}else if(document.getElementById){
		b = evt.currentTarget;
		relT = evt.relatedTarget;
		while(relT != null){
			if(b == relT){
				mT = true;
				break;
			}
			relT = relT.parentNode;
		}
		if(!mT){
			b.style.visibility = "hidden";
		}
	}
}

function P7_autoHide() { //v1.3 by PVII
	 var i,g,args = P7_autoHide.arguments;
	 for(i=0;i<args.length;i++){
		if((g = MM_findObj(args[i])) != null){
			g.p7aHide = true;
			if(document.layers){
				g.captureEvents(Event.MOUSEOUT);
			}
			g.onmouseout = P7_hideDiv;
			g.p7ahD = true;
		}
	}
}

function P7_autoLayers() { //v1.4 by PVII
	var g,b,k,f,args = P7_autoLayers.arguments;
	a = parseInt(args[0]);
	if(isNaN(a))
		a = 0;
	if(!document.p7setc)  {
		p7c = new Array();
		document.p7setc = true;
		for(var u=0;u<10;u++)  {
			p7c[u] = new Array();
		}
	}
	for(k=0;k<p7c[a].length;k++)  {
		if((g = MM_findObj(p7c[a][k])) != null)  {
			b = (document.layers)?g:g.style;
			b.visibility = "hidden";
		}
	}
	for(k=1;k<args.length;k++)  {
		if((g = MM_findObj(args[k])) != null)  {
			b = (document.layers)?g:g.style;
			b.visibility = "visible";
			f = false;
			for(var j=0;j<p7c[a].length;j++)  {
				if(args[k] == p7c[a][j])  {
					f = true;
				}
			}
			if(!f)  {
				p7c[a][p7c[a].length++] = args[k];
			}
		}
	}
}