if (document.images) {
	var img1 = new Image();
	img1.src = "img/navi_sneaker_on.gif";
	var img2 = new Image();
	img2.src = "img/navi_shop_on.gif";
	var img3 = new Image();
	img3.src = "img/navi_community_on.gif";
	var img4 = new Image();
	img4.src = "img/navi_info_on.gif";
}