<!--
//イメージの事前読み込み
if(document.images) {
 var imgs = new Array();
  imgs[00] = new Image; imgs[00].src = "../images/btn01.gif";
  imgs[01] = new Image; imgs[01].src = "../images/btn01_o.gif";
  imgs[02] = new Image; imgs[02].src = "../images/btn02.gif";
  imgs[03] = new Image; imgs[03].src = "../images/btn02_o.gif";
  imgs[04] = new Image; imgs[04].src = "../images/btn03.gif";
  imgs[05] = new Image; imgs[05].src = "../images/btn03_o.gif";
  imgs[06] = new Image; imgs[06].src = "../images/btn04.gif";
  imgs[07] = new Image; imgs[07].src = "../images/btn04_o.gif";
  imgs[08] = new Image; imgs[08].src = "../images/btn05.gif";
  imgs[09] = new Image; imgs[09].src = "../images/btn05_o.gif";
  imgs[10] = new Image; imgs[10].src = "../images/btn06.gif";
  imgs[11] = new Image; imgs[11].src = "../images/btn06_o.gif";
  imgs[12] = new Image; imgs[12].src = "../images/btn07.gif";
  imgs[13] = new Image; imgs[13].src = "../images/btn07_o.gif";
  imgs[14] = new Image; imgs[14].src = "../images/btn08.gif";
  imgs[15] = new Image; imgs[15].src = "../images/btn08_o.gif";
    imgs[16] = new Image; imgs[16].src = "../images/btn09.gif";
  imgs[17] = new Image; imgs[17].src = "../images/btn09_o.gif";
    imgs[18] = new Image; imgs[18].src = "../images/btn10.gif";
  imgs[19] = new Image; imgs[19].src = "../images/btn10_o.gif";
      imgs[20] = new Image; imgs[20].src = "../images/btn11.gif";
  imgs[21] = new Image; imgs[21].src = "../images/btn11_o.gif";

}
//画像書き換え
function chgimg(id, imgname) {
 if(document.images) {
  if(imgs[imgname]) {
    document.images[id].src = imgs[imgname].src;
  }
  else {
    document.images[id].src = imgname;
  }
 }
}
// -->