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) {
		productmenu_01_o = newImage("img/productmenu_01_o.jpg");
		productmenu_02_o = newImage("img/productmenu_02_o.jpg");
		productmenu_03_o = newImage("img/productmenu_03_o.jpg");
		productmenu_04_o = newImage("img/productmenu_04_o.jpg");
		productmenu_05_o = newImage("img/productmenu_05_o.jpg");
		productmenu_06_o = newImage("img/productmenu_06_o.jpg");
		productmenu_07_o = newImage("img/productmenu_07_o.jpg");
		productmenu_08_o = newImage("img/productmenu_08_o.jpg");
		productmenu2_01_o = newImage("img/productmenu2_01_o.jpg");
		productmenu2_02_o = newImage("img/productmenu2_02_o.jpg");
		productmenu2_03_o = newImage("img/productmenu2_03_o.jpg");
		productmenu2_04_o = newImage("img/productmenu2_04_o.jpg");
		preloadFlag = true;
	}
}