<!--
/* 画像の先行読み込み */
if(document.images) {
 var imgs = new Array();
 imgs[0] = new Image();  imgs[0].src = "./images/con1_a.gif";
 imgs[1] = new Image();  imgs[1].src = "./images/con1_b.gif";

 imgs[2] = new Image();  imgs[2].src = "./images/con2_a.gif";
 imgs[3] = new Image();  imgs[3].src = "./images/con2_b.gif";

 imgs[4] = new Image();  imgs[4].src = "./images/con3_a.gif";
 imgs[5] = new Image();  imgs[5].src = "./images/con3_b.gif";

 imgs[6] = new Image();  imgs[6].src = "./images/con4_a.gif";
 imgs[7] = new Image();  imgs[7].src = "./images/con4_b.gif";

 imgs[8] = new Image();  imgs[8].src = "./images/kartin_a.gif";
 imgs[9] = new Image();  imgs[9].src = "./images/kartin_b.gif";

 imgs[10] = new Image();  imgs[10].src = "./images/mail_a.gif";
 imgs[11] = new Image();  imgs[11].src = "./images/mail_b.gif";

}

function swapimg(id, imgname) {
 if(document.images) {
  if(imgs[imgname]) {
    document.images[id].src = imgs[imgname].src;
  }
  else {
    document.images[id].src = imgname;
  }
 }
}
//-->