userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(changeImages.arguments[i],0);
			}
			else {
				img = document.images[changeImages.arguments[i]];
			}
			if (img) {
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		layout_rollovers3_2_01_over = newImage("../images/layout-rollovers3-2_01-over.png");
		layout_rollovers3_2_03_over = newImage("../images/layout-rollovers3-2_03-over.png");
		nav_left_over = newImage("../images/nav_left-over.png");
		nav_left_over008 = newImage("../images/nav_left-over-08.png");
		nav_left_over009 = newImage("../images/nav_left-over-09.png");
		nav_left_over010 = newImage("../images/nav_left-over-10.png");
		nav_left_over011 = newImage("../images/nav_left-over-11.png");
		nav_left_over012 = newImage("../images/nav_left-over-12.png");
		nav_right_over = newImage("../images/nav_right-over.png");
		nav_right_over016 = newImage("../images/nav_right-over-16.png");
		nav_right_over017 = newImage("../images/nav_right-over-17.png");
		nav_right_over018 = newImage("../images/nav_right-over-18.png");
		nav_right_over019 = newImage("../images/nav_right-over-19.png");
		nav_right_over020 = newImage("../images/nav_right-over-20.png");
		bottom_over = newImage("../images/bottom-over.png");
		preloadFlag = true;
	}
}