if (document.images) {
   img101 = new Image(); img101.src = "img/button/b101.gif";
   img102 = new Image(); img102.src = "img/button/b102.gif";
   img103 = new Image(); img103.src = "img/button/b103.gif";
   img104 = new Image(); img104.src = "img/button/b104.gif";
   img105 = new Image(); img105.src = "img/button/b105.gif";
   img106 = new Image(); img106.src = "img/button/b106.gif";
   img107 = new Image(); img107.src = "img/button/b107.gif";
   img108 = new Image(); img108.src = "img/button/b108.gif";
   img109 = new Image(); img109.src = "img/button/b109.gif";
   img110 = new Image(); img110.src = "img/button/b110.gif";
   img111 = new Image(); img111.src = "img/button/b111.gif";
   img112 = new Image(); img112.src = "img/button/b112.gif";
   img113 = new Image(); img113.src = "img/button/b113.gif";
   img114 = new Image(); img114.src = "img/button/b114.gif";
   img115 = new Image(); img115.src = "img/button/b115.gif";
   img116 = new Image(); img116.src = "img/button/b116.gif";
   img117 = new Image(); img117.src = "img/button/b117.gif";
   img118 = new Image(); img118.src = "img/button/b118.gif";
}
function setImage(img, image) {
   if (img) {
      img.src = image;
   }
}