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];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		rsc04_over = newImage("images/rsc04-over.jpg");
		rsc07_over = newImage("images/rsc07-over.jpg");
		rsc09_over = newImage("images/rsc09-over.jpg");
		rsc10_over = newImage("images/rsc10-over.jpg");
		rsc11_over = newImage("images/rsc11-over.jpg");
		rsc12_over = newImage("images/rsc12-over.jpg");
		rsc14_over = newImage("images/rsc14-over.jpg");
		rsc15_over = newImage("images/rsc15-over.jpg");
		preloadFlag = true;
	}
}