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

function changeImages() {
	if (document.images) {
		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) {
		left_01_over = newImage("images/left_01-over.gif");
		left_02_over = newImage("images/left_02-over.gif");
		left_03_over = newImage("images/left_03-over.gif");
		left_04_over = newImage("images/left_04-over.gif");
		left_05_over = newImage("images/left_05-over.gif");
		left_06_over = newImage("images/left_06-over.gif");
		left_07_over = newImage("images/left_07-over.gif");
		left_08_over = newImage("images/left_08-over.gif");
		left_09_over = newImage("images/left_09-over.gif");
		left_10_over = newImage("images/left_10-over.gif");
		left_11_over = newImage("images/left_11-over.gif");
		left_12_over = newImage("images/left_12-over.gif");
		left_13_left_12_over = newImage("images/left_13-left_12_over.gif");
		left_13_over = newImage("images/left_13-over.gif");
		left_14_left_13_over = newImage("images/left_14-left_13_over.gif");
		top_final_01_over = newImage("images/top-final_01-over.jpg");
		top_final_02_over = newImage("images/top-final_02-over.jpg");
		top_final_03_over = newImage("images/top-final_03-over.jpg");
		top_final_04_over = newImage("images/top-final_04-over.jpg");
		top_final_05_over = newImage("images/top-final_05-over.jpg");
		top_final_06_over = newImage("images/top-final_06-over.jpg");
		top_final_08_top_final_01_over = newImage("images/top-final_08-top-final_01_o.jpg");
		top_final_09_top_final_01_over = newImage("images/top-final_09-top-final_01_o.jpg");
		top_final_09_top_final_02_over = newImage("images/top-final_09-top-final_02_o.jpg");
		top_final_09_top_final_03_over = newImage("images/top-final_09-top-final_03_o.jpg");
		top_final_10_top_final_04_over = newImage("images/top-final_10-top-final_04_o.jpg");
		top_final_10_top_final_05_over = newImage("images/top-final_10-top-final_05_o.jpg");
		top_final_11_top_final_06_over = newImage("images/top-final_11-top-final_06_o.jpg");
		preloadFlag = true;
	}
}