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) {
		ba_04_over = newImage("img/ba_04-over.gif");
		ba_05_over = newImage("img/ba_05-over.gif");
		ba_06_over = newImage("img/ba_06-over.gif");
		ba_07_over = newImage("img/ba_07-over.gif");
		ba_08_over = newImage("img/ba_08-over.gif");
		ba_09_over = newImage("img/ba_09-over.gif");
		ba_10_over = newImage("img/ba_10-over.gif");
		ba_12_ba_04_over = newImage("img/ba_12-ba_04_over.jpg");
		ba_12_ba_05_over = newImage("img/ba_12-ba_05_over.jpg");
		ba_12_ba_06_over = newImage("img/ba_12-ba_06_over.jpg");
		ba_12_ba_07_over = newImage("img/ba_12-ba_07_over.jpg");
		ba_12_ba_08_over = newImage("img/ba_12-ba_08_over.jpg");
		ba_12_ba_09_over = newImage("img/ba_12-ba_09_over.jpg");
		ba_12_ba_10_over = newImage("img/ba_12-ba_10_over.jpg");
		preloadFlag = true;
	}
}