// random
img = new Array();


// img address
img[0] = "http://ad.jp.ap.valuecommerce.com/servlet/gifbanner?sid=2665025&pid=879135980";
img[1] = "http://ad.jp.ap.valuecommerce.com/servlet/gifbanner?sid=2665025&pid=879139344";
img[2] = "http://ad.jp.ap.valuecommerce.com/servlet/gifbanner?sid=2665025&pid=879139362";
img[3] = "http://ad.jp.ap.valuecommerce.com/servlet/gifbanner?sid=2665025&pid=879139366";


n = Math.floor(Math.random()*img.length);
document.write("<a href='/redirect/index.php?id=yamanote' target='_blank'><img src='"+img[n]+"' alt='' width='120' height='120' class='ov' /></a>");