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) {
		mypage_over = newImage("images/mypage_on.gif");
		member_over = newImage("images/member_on.gif");
		cartin_over = newImage("images/cartin_on.gif");
		howto_over = newImage("http://shop.littlefield.jp/user_data/packages/tpl20080606/img/side//howto_on.gif");
		howorder_over = newImage("http://shop.littlefield.jp/user_data/packages/tpl20080606/img/side//howorder_on.gif");
		about_over = newImage("http://shop.littlefield.jp/user_data/packages/tpl20080606/img/side//about_on.gif");
		low_over = newImage("http://shop.littlefield.jp/user_data/packages/tpl20080606/img/side//low_on.gif");
		preloadFlag = true;
	}
}