if(document.images) {
 var imgs = new Array();
 imgs[0] = new Image();  imgs[0].src = "../images/index06-2.gif";
 imgs[1] = new Image();  imgs[1].src = "../images/index06-1.gif";
 imgs[2] = new Image();  imgs[2].src = "../images/back06-2.gif";
 imgs[3] = new Image();  imgs[3].src = "../images/back06-1.gif";
 imgs[4] = new Image();  imgs[4].src = "../images/next06-2.gif";
 imgs[5] = new Image();  imgs[5].src = "../images/next06-1.gif";
}

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