/* 画像の先行読み込み */
if(document.images) {
 var imgs = new Array();
 imgs[0] = new Image();  imgs[0].src = "img/mn_home_on.gif"; //画像パスを入力
 imgs[1] = new Image();  imgs[1].src = "img/mn_menu_on.gif";
 imgs[2] = new Image();  imgs[2].src = "img/mn_party_on.gif";
 imgs[3] = new Image();  imgs[3].src = "img/mn_info_on.gif";
 imgs[4] = new Image();  imgs[4].src = "img/mn_map_on.gif";
 imgs[5] = new Image();  imgs[5].src = "img/mn_bbs_on.gif";

 imgs[8] = new Image();  imgs[8].src = "img/mn_home.gif"; //画像パスを入力
 imgs[9] = new Image();  imgs[9].src = "img/mn_menu.gif";
 imgs[10] = new Image();  imgs[10].src = "img/mn_party.gif";
 imgs[11] = new Image();  imgs[11].src = "img/mn_info.gif";
 imgs[12] = new Image();  imgs[12].src = "img/mn_map.gif";
 imgs[15] = new Image();  imgs[15].src = "img/mn_bbs.gif";


}

function chgimg(id, imgname) {
 if(document.images) {
  if(imgs[imgname]) {
    document.images[id].src = imgs[imgname].src;
  }
  else {
    document.images[id].src = imgname;
  }
 }
}