// if (document.images) {
//  main1 = new Image(); main1.src = "../map/main-bk.jpg";
//  main2 = new Image(); main2.src = "../map/main-em.jpg";
//  songs1 = new Image(); songs1.src = "../map/songs-bk.jpg";
//  songs2 = new Image(); songs2.src = "../map/songs-em.jpg";
// }

  main1 = new Image(); main1.src = "../map/main-bk.jpg";
  main2 = new Image(); main2.src = "../map/main-em.jpg";
  songs1 = new Image(); songs1.src = "../map/songs-bk.jpg";
  songs2 = new Image(); songs2.src = "../map/songs-em.jpg";
  photos1 = new Image(); photos1.src = "../map/photos-bk.jpg";
  photos2 = new Image(); photos2.src = "../map/photos-em.jpg";
  drawing1 = new Image(); drawing1.src = "../map/drawing-bk.jpg";
  drawing2 = new Image(); drawing2.src = "../map/drawing-em.jpg";
  writing1 = new Image(); writing1.src = "../map/writing-bk.jpg";
  writing2 = new Image(); writing2.src = "../map/writing-em.jpg";
  toyin1 = new Image(); toyin1.src = "../map/toyin-bk.jpg";
  toyin2 = new Image(); toyin2.src = "../map/toyin-em.jpg";
  foonli1 = new Image(); foonli1.src = "../map/foonli-bk.jpg";
  foonli2 = new Image(); foonli2.src = "../map/foonli-em.jpg";


function imgOn(imgName, imgno) {
  if (document.images) {
       document[imgName].src = eval(imgName + imgno + ".src");
     }
}