/* 画像の先行読み込み */
<!--
if(document.images) {
 var imgs = new Array();
 imgs[0] = new Image();  imgs[0].src = "./img/map_1.png"; 
 imgs[1] = new Image();  imgs[1].src = "./img/map_2.png";
 imgs[2] = new Image();  imgs[2].src = "./img/contact_1.png";
 imgs[3] = new Image();  imgs[3].src = "./img/contact_2.png";
 imgs[4] = new Image();  imgs[4].src = "./img/cons1.gif";
 imgs[5] = new Image();  imgs[5].src = "./img/cons2.gif";
 imgs[6] = new Image();  imgs[6].src = "./img/deve1.gif";
 imgs[7] = new Image();  imgs[7].src = "./img/deve2.gif";
 imgs[8] = new Image();  imgs[8].src = "./img/jire1.gif";
 imgs[9] = new Image();  imgs[9].src = "./img/jire2.gif";
 imgs[10] = new Image();  imgs[10].src = "./img/partner1.gif";
 imgs[11] = new Image();  imgs[11].src = "./img/partner2.gif";
 imgs[12] = new Image();  imgs[12].src = "./img/riademo1.gif";
 imgs[13] = new Image();  imgs[13].src = "./img/riademo2.gif";
 imgs[14] = new Image();  imgs[14].src = "./img/kaihatu_s1.gif";
 imgs[15] = new Image();  imgs[15].src = "./img/kaihatu_s2.gif";
}

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