var ver4 = (navigator.appVersion.charAt(0) >= "4");
var NN4  = ver4 && (navigator.appName == "Netscape");
var IE4 = ver4 && (navigator.appName.charAt(0) == "M");
var NN3 = ((navigator.appVersion.charAt(0) == "3") && (navigator.appName == "Netscape"));

if(NN3 || NN4 || IE4){
var imgNavi = new Array();
imgNavi[0] = new Image();  imgNavi[0].src = "http://homepage2.nifty.com/jiyushodo/img/home.gif";
imgNavi[1] = new Image();  imgNavi[1].src = "http://homepage2.nifty.com/jiyushodo/img/home2.gif";
imgNavi[2] = new Image();  imgNavi[2].src = "/jiyushodo/img/navi_info_on.gif";
imgNavi[3] = new Image();  imgNavi[3].src = "/jiyushodo/img/navi_info_off.gif";
imgNavi[4] = new Image();  imgNavi[4].src = "/jiyushodo/img/navi_jiyu_on.gif";
imgNavi[5] = new Image();  imgNavi[5].src = "/jiyushodo/img/navi_jiyu_off.gif";
imgNavi[6] = new Image();  imgNavi[6].src = "/jiyushodo/img/navi_gallery_on.gif";
imgNavi[7] = new Image();  imgNavi[7].src = "/jiyushodo/img/navi_gallery_off.gif";
imgNavi[8] = new Image();  imgNavi[8].src = "/jiyushodo/img/navi_century_on.gif";
imgNavi[9] = new Image();  imgNavi[9].src = "/jiyushodo/img/navi_century_off.gif";
imgNavi[10] = new Image();  imgNavi[10].src = "/jiyushodo/img/navi_fude_on.gif";
imgNavi[11] = new Image();  imgNavi[11].src = "/jiyushodo/img/navi_fude_off.gif";
imgNavi[12] = new Image();  imgNavi[12].src = "/jiyushodo/img/navi_sample_on.gif";
imgNavi[13] = new Image();  imgNavi[13].src = "/jiyushodo/img/navi_sample_off.gif";
}

function NaviIn(nam,num) {
if(NN3 || NN4 || IE4) document.images[nam].src = imgNavi[num].src;
}

function NaviOut(nam,num) {
if(NN3 || NN4 || IE4) document.images[nam].src = imgNavi[num].src;
}