if (navigator.appVersion > "3") {
    menu_stage1 = new Image(); menu_stage1.src = 'img/botton_stage.jpg';
    menu_stage2 = new Image(); menu_stage2.src = 'img/botton_stage_on.jpg';
    menu_resson1 = new Image(); menu_resson1.src = 'img/botton_resson.jpg';
    menu_resson2 = new Image(); menu_resson2.src = 'img/botton_resson_on.jpg';
    menu_join1 = new Image(); menu_join1.src = 'img/botton_join.jpg';
    menu_join2 = new Image(); menu_join2.src = 'img/botton_join_on.jpg';
    menu_profile1 = new Image(); menu_profile1.src = 'img/botton_profile.jpg';
    menu_profile2 = new Image(); menu_profile2.src = 'img/botton_profile_on.jpg';
    menu_access1 = new Image(); menu_access1.src = 'img/botton_access.jpg';
    menu_access2 = new Image(); menu_access2.src = 'img/botton_access_on.jpg';
    menu_album1 = new Image(); menu_album1.src = 'img/botton_album.jpg';
    menu_album2 = new Image(); menu_album2.src = 'img/botton_album_on.jpg';
    menu_faq1 = new Image(); menu_faq1.src = 'img/botton_faq.jpg';
    menu_faq2 = new Image(); menu_faq2.src = 'img/botton_faq_on.jpg';

    bana_now1 = new Image(); bana_now1.src = 'img/bana_now.jpg';
    bana_now2 = new Image(); bana_now2.src = 'img/bana_now_on.jpg';
    bana_next1 = new Image(); bana_next1.src = 'img/bana_next.jpg';
    bana_next2 = new Image(); bana_next2.src = 'img/bana_next_on.jpg';
    bana_movie1 = new Image(); bana_movie1.src = 'img/bana_movie.jpg';
    bana_movie2 = new Image(); bana_movie2.src = 'img/bana_movie_on.jpg';
    bana_studio_ok1 = new Image(); bana_studio_ok1.src = 'img/bana_studio_ok.jpg';
    bana_studio_ok2 = new Image(); bana_studio_ok2.src = 'img/bana_studio_ok_on.jpg';
    bana_studio_ng1 = new Image(); bana_studio_ng1.src = 'img/bana_studio_ng.jpg';
    bana_studio_ng2 = new Image(); bana_studio_ng2.src = 'img/bana_studio_ng_on.jpg';
    bana_studio_few1 = new Image(); bana_studio_few1.src = 'img/bana_studio_few.jpg';
    bana_studio_few2 = new Image(); bana_studio_few2.src = 'img/bana_studio_few_on.jpg';

    textsize_big1 = new Image(); textsize_big1.src = 'img/text_size_big.gif';
    textsize_big2 = new Image(); textsize_big2.src = 'img/text_size_big_on.gif';
    textsize_small1 = new Image(); textsize_small1.src = 'img/text_size_small.gif';
    textsize_small2 = new Image(); textsize_small2.src = 'img/text_size_small_on.gif';

    bana_life1 = new Image(); bana_life1.src = 'img/bana_life.jpg';
    bana_life2 = new Image(); bana_life2.src = 'img/bana_life_on.jpg';
    bana_classic1 = new Image(); bana_classic1.src = 'img/bana_classic.jpg';
    bana_classic2 = new Image(); bana_classic2.src = 'img/bana_classic_on.jpg';
    bana_taiken1 = new Image(); bana_taiken1.src = 'img/bana_taiken.jpg';
    bana_taiken2 = new Image(); bana_taiken2.src = 'img/bana_taiken_on.jpg';

    bana_top1 = new Image(); bana_top1.src = 'img/logo_sub.jpg';
    bana_top2 = new Image(); bana_top2.src = 'img/logo_sub_on.jpg';
}

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