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

function ACSswapImages(item,image) {
var x = $(item);
x.src=image;
}

function preLoadImgs() {
	mainNav_01_on = ACSnewImg('../images/mainNav_01-on.png');
	mainNav_02_on = ACSnewImg('../images/mainNav_01-on.png');
	mainNav_03_on = ACSnewImg('../images/mainNav_01-on.png');
	mainNav_04_on = ACSnewImg('../images/mainNav_01-on.png');
}