// ランダムに画像を表示する
img = new Array();
img[0] = "./img/shoptopimg.jpg";
img[1] = "./img/shoptopimg.jpg";
img[2] = "./img/shoptopimg.jpg";
img[3] = "./img/shoptopimg2.jpg";
img[4] = "./img/shoptopimg2.jpg";
var n = Math.floor(Math.random()*img.length);
document.write("<img src='"+img[n]+"' border='0'>");