var EOF = false;
/* create global rollover variables */
var navImg1On = new Image();
navImg1On.src = "../images/nav_01_over.gif";

var navImg2On = new Image();
navImg2On.src = "../images/nav_02_over.gif";

var navImg3On = new Image();
navImg3On.src = "../images/nav_03_over.gif";

var navImg4On = new Image();
navImg4On.src = "../images/nav_04_over.gif";

var navImg5On = new Image();
navImg5On.src = "../images/nav_05_over.gif";

var navImg6On = new Image();
navImg6On.src = "../images/nav_06_over.gif";

var navImg7On = new Image();
navImg7On.src = "../images/nav_07_over.gif";

function findHeight (objectID) {
	var dom = findDOM(objectID, 0);
	if (dom.offsetHeight) {
		return dom.offsetHeight;
	}
	if (dom.clip.height) {
		return dom.clip.height;
	}
	return (null);
}

var isMozilla = null;
var isNS = null;
var isIE = null;
var isIEMac = null;
var isOther = null;
//	
function detectBrowser() {
	if (navigator.appCodeName.indexOf('Mozilla') != -1) {
		isMozilla = 1;
	}
	if (navigator.appName.indexOf('Netscape') != -1) {
		isNS = 1;
	}
	if (navigator.appName.indexOf('Microsoft Internet Explorer') != -1) {
		isIE = 1;
	} else {
		isOther = 1;
	}
	var browserVersion = parseInt(navigator.appVersion);
}
//
function fixIE() {
	var bgDOM = findDOM('bg');
	if (isIE == 1) {	
         bgDOM.style.paddingTop = "10px";
	}
}
//
var textLayers = new Array("layer01","layer02","layer03","layer04","layer05","layer06","layer07","layer08","layer09","layer10");
//
function hideAll() {
	for (var i = 0; i < textLayers.length; i++) {
		var layerDOM = findDOM(textLayers[i], 1);
		layerDOM.visibility = "hidden";
	}
}
// preload narrative images
function preloadImages() {
	var narrIntro = new Image();
	narrIntro.src = "../images/narrIntroCopy.gif";
	
	var narr01 = new Image();
	narr01.src = "../images/n01.jpg";
	
	var narr02 = new Image();
	narr02.src = "../images/n02.jpg";
	
	var narr03 = new Image();
	narr03.src = "../images/n03.jpg";
	
	var narr04 = new Image();
	narr04.src = "../images/n04.jpg";
	
	var narr05 = new Image();
	narr05.src = "../images/n05.jpg";
	
	var narr06 = new Image();
	narr06.src = "../images/n06.jpg";
	
	var narr07 = new Image();
	narr07.src = "../images/n07.jpg";
	
	var narr08 = new Image();
	narr08.src = "../images/n08.jpg";
	
	var narr09 = new Image();
	narr09.src = "../images/n09.jpg";
	
	var narr10 = new Image();
	narr10.src = "../images/n01.jpg";
}
//
var whichLayer = null;
var imgArea = null;
var imgNum = null;
//
function displayLayer(thisLayer) {
	for (var i = 0; i < textLayers.length; i++) {
		var layerDOM = findDOM(textLayers[i], 1);
		layerDOM.visibility = "hidden";
	}
	imgArea = findDOM('narrImg');
	imgArea.src = "../images/blank.gif";
	imgNum = thisLayer.substr(5,2);
	imgArea.src = '../images/n' + imgNum + ".jpg";
	whichLayer = findDOM(thisLayer, 1);
	whichLayer.visibility = "visible";
}
EOF = true;