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

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

function changeImages2() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages2.arguments.length; i+=2) {
			document[changeImages2.arguments[i]].src = changeImages2.arguments[i+1];
		}
	}
}

var preloadFlag = false;

function preloadImages() {
	if (document.images) {
		img_one = newImage("images/sky1.jpg");
		img_two = newImage("images/sky2.jpg");
		img_three = newImage("images/sky3.jpg");
		img_four = newImage("images/sky4.jpg");
		img_five = newImage("images/sky5.jpg");
		img_six = newImage("images/tub1.jpg");
		img_seven = newImage("images/tub2.jpg");
		img_eight = newImage("images/tub3.jpg");
		preloadFlag = true;
	}
}