var ver4 = (navigator.appVersion.charAt(0) >= "4");
var NN4 = ver4 && (navigator.appName.charAt(0) == "N");
var IE4 = ver4 && (navigator.appName.charAt(0) == "M");
var NC6 = (navigator.appVersion.charAt(0) >= "5");

if (NN4 || IE4 || NC6) {
var img_b = new Array();
	img_b[0] = new Image();  img_b[0].src = "../images/common/btn_infomation.gif";
	img_b[1] = new Image();  img_b[1].src = "../images/common/btn_infomation_on.gif";
	img_b[2] = new Image();  img_b[2].src = "../images/common/btn_letter.gif";
	img_b[3] = new Image();  img_b[3].src = "../images/common/btn_letter_on.gif";
	img_b[4] = new Image();  img_b[4].src = "../images/common/btn_schedule.gif";
	img_b[5] = new Image();  img_b[5].src = "../images/common/btn_schedule_on.gif";
	img_b[6] = new Image();  img_b[6].src = "../images/common/btn_biography.gif";
	img_b[7] = new Image();  img_b[7].src = "../images/common/btn_biography_on.gif";
	img_b[8] = new Image();  img_b[8].src = "../images/common/btn_discography.gif";
	img_b[9] = new Image();  img_b[9].src = "../images/common/btn_discography_on.gif";
	img_b[10] = new Image();  img_b[10].src = "../images/common/btn_fanclub.gif";
	img_b[11] = new Image();  img_b[11].src = "../images/common/btn_fanclub_on.gif";
	img_b[12] = new Image();  img_b[12].src = "../images/common/btn_shopping.gif";
	img_b[13] = new Image();  img_b[13].src = "../images/common/btn_shopping_on.gif";
	img_b[14] = new Image();  img_b[14].src = "../images/common/btn_links.gif";
	img_b[15] = new Image();  img_b[15].src = "../images/common/btn_links_on.gif";
	img_b[16] = new Image();  img_b[16].src = "../images/arrow_reds_003.gif";
	img_b[17] = new Image();  img_b[17].src = "../images/arrow_reds_on.gif";
	img_b[18] = new Image();  img_b[18].src = "../images/common/pagetop.gif";
	img_b[19] = new Image();  img_b[19].src = "../images/common/pagetop_on.gif";
	img_b[20] = new Image();  img_b[20].src = "../images/shopping/shopping_order.gif";
	img_b[21] = new Image();  img_b[21].src = "../images/shopping/shopping_order_on.gif";
	img_b[22] = new Image();  img_b[22].src = "../images/common/btn_home.gif";
	img_b[23] = new Image();  img_b[23].src = "../images/common/btn_home_on.gif";

	}

function b_on(nam,num){
	if(NN4 || IE4 || NC6)
	document.images[nam].src = img_b[num].src;
}

function b_out(nam,num){
	if(NN4 || IE4 || NC6)
	document.images[nam].src = img_b[num].src;
	return false;
}