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) {
		Slice_03_over = newImage("images/Slice_03-over.jpg");
		Slice_04_over = newImage("images/Slice_04-over.jpg");
		Slice_05_over = newImage("images/Slice_05-over.jpg");
		Slice_06_over = newImage("images/Slice_06-over.jpg");
		Slice_07_over = newImage("images/Slice_07-over.jpg");
		Slice_08_over = newImage("images/Slice_08-over.jpg");
		Slice_09_over = newImage("images/Slice_09-over.jpg");
		Slice_10_over = newImage("images/Slice_10-over.jpg");
		Slice_11_over = newImage("images/Slice_11-over.jpg");
		Slice_12_over = newImage("images/Slice_12-over.jpg");
		Slice_16_over = newImage("images/Slice_16-over.jpg");
		Slice_17_over = newImage("images/Slice_17-over.jpg");
		Slice_18_over = newImage("images/Slice_18-over.jpg");
		Slice_19_over = newImage("images/Slice_19-over.jpg");
		preloadFlag = true;
	}
}