if (navigator.appVersion > "3") {

	
	img1 = new Image(); img1.src = "images/menu_art_a.gif";
	img2 = new Image(); img2.src = "images/menu_art_b.gif";
	
	img3 = new Image(); img3.src = "images/menu_music_a.gif";
	img4 = new Image(); img4.src = "images/menu_music_b.gif";
	
	img5 = new Image(); img5.src = "images/menu_fb_a.gif";
	img6 = new Image(); img6.src = "images/menu_fb_b.gif";
	
	img7 = new Image(); img7.src = "images/menu_tw_a.gif";
	img8 = new Image(); img8.src = "images/menu_tw_b.gif";
	
	img9 = new Image(); img9.src = "images/menu_contact_a.gif";
	img10 = new Image(); img10.src = "images/menu_contact_b.gif";
	
	img11 = new Image(); img11.src = "images/musicuration_a.jpg";
	img12 = new Image(); img12.src = "images/musicuration_b.jpg";
	
	img13 = new Image(); img13.src = "images/backtotop_a.gif";
	img14 = new Image(); img14.src = "images/backtotop_b.gif";
	
	img15 = new Image(); img15.src = "images/bbp_hakoniwa_a.gif";
	img16 = new Image(); img16.src = "images/bbp_hakoniwa_b.gif";

}

function imgChange(imgName,imgNum) {
                    if (navigator.appVersion > "3") {
                    document.images[imgName].src = eval(imgNum + ".src");
		}
}