if (document.images) {
 var img = new Array();

 img[01] = new Image();  img[01].src = "../img/navi_annai.gif";
 img[02] = new Image();  img[02].src = "../img/navi_annai_on.gif";

 img[03] = new Image();  img[03].src = "../img/navi_links.gif";
 img[04] = new Image();  img[04].src = "../img/navi_links_on.gif";

 img[05] = new Image();  img[05].src = "../img/navi_mail.gif";
 img[06] = new Image();  img[06].src = "../img/navi_mail_on.gif";

 img[07] = new Image();  img[07].src = "../img/navi_mokuroku.gif";
 img[08] = new Image();  img[08].src = "../img/navi_mokuroku_on.gif";

 img[09] = new Image();  img[09].src = "../img/navi_loft.gif";
 img[10] = new Image();  img[10].src = "../img/navi_loft_on.gif";

 img[11] = new Image();  img[11].src = "../img/navi_tokuyakuten.gif";
 img[12] = new Image();  img[12].src = "../img/navi_tokuyakuten_on.gif";

 img[13] = new Image();  img[13].src = "../img/booknavi_harvey.gif";
 img[14] = new Image();  img[14].src = "../img/booknavi_harvey_on.gif";

 img[15] = new Image();  img[15].src = "../img/booknavi_enbetsu.gif";
 img[16] = new Image();  img[16].src = "../img/booknavi_enbetsu_on.gif";

 img[17] = new Image();  img[17].src = "../img/booknavi_neppu.gif";
 img[18] = new Image();  img[18].src = "../img/booknavi_neppu_on.gif";

 img[19] = new Image();  img[19].src = "../img/booknavi_doko.gif";
 img[20] = new Image();  img[20].src = "../img/booknavi_doko_on.gif";

 img[21] = new Image();  img[21].src = "../img/booknavi_uchujin.gif";
 img[22] = new Image();  img[22].src = "../img/booknavi_uchujin_on.gif";

 img[23] = new Image();  img[23].src = "../img/top_booknavi_harvey.gif";
 img[24] = new Image();  img[24].src = "../img/top_booknavi_harvey_on.gif";

 img[25] = new Image();  img[25].src = "../img/top_booknavi_enbetsu.gif";
 img[26] = new Image();  img[26].src = "../img/top_booknavi_enbetsu_on.gif";

 img[27] = new Image();  img[27].src = "../img/top_booknavi_neppu.gif";
 img[28] = new Image();  img[28].src = "../img/top_booknavi_neppu_on.gif";

 img[29] = new Image();  img[29].src = "../img/top_booknavi_doko.gif";
 img[30] = new Image();  img[30].src = "../img/top_booknavi_doko_on.gif";

 img[31] = new Image();  img[31].src = "../img/top_booknavi_uchujin.gif";
 img[32] = new Image();  img[32].src = "../img/top_booknavi_uchujin_on.gif";

 img[33] = new Image();  img[33].src = "../img/button_buy.gif";
 img[34] = new Image();  img[34].src = "../img/button_buy_on.gif";

 img[35] = new Image();  img[35].src = "../img/button_review.gif";
 img[36] = new Image();  img[36].src = "../img/button_review_on.gif";

 img[37] = new Image();  img[37].src = "../img/button_voice.gif";
 img[38] = new Image();  img[38].src = "../img/button_voice_on.gif";

 img[39] = new Image();  img[39].src = "../img/navi_bbs.gif";
 img[40] = new Image();  img[40].src = "../img/navi_bbs_on.gif";

 img[41] = new Image();  img[41].src = "../img/navi_privacy.gif";
 img[42] = new Image();  img[42].src = "../img/navi_privacy_on.gif";

 img[43] = new Image();  img[43].src = "../img/button_buy_postcard.gif";
 img[44] = new Image();  img[44].src = "../img/button_buy_postcard_on.gif";

 img[45] = new Image();  img[45].src = "../img/booknavi_kazoku.gif";
 img[46] = new Image();  img[46].src = "../img/booknavi_kazoku_on.gif";

 img[47] = new Image();  img[47].src = "../img/booknavi_tomochan.gif";
 img[48] = new Image();  img[48].src = "../img/booknavi_tomochan_on.gif";

 img[49] = new Image();  img[49].src = "../img/top_booknavi_kazoku.gif";
 img[50] = new Image();  img[50].src = "../img/top_booknavi_kazoku_on.gif";

 img[51] = new Image();  img[51].src = "../img/top_booknavi_tomochan.gif";
 img[52] = new Image();  img[52].src = "../img/top_booknavi_tomochan_on.gif";

}

function swapImg(name,num) {
 if (document.images) {
    document.images[name].src = img[num].src;
 }
}