function amazonNoImg(imgSrc) {
    var imgs = this.document.images;
    for (var i = 0; i < imgs.length; i++) {
        if (imgs[i].src.match (/\bamazon\b/)) {
            if (imgs[i].width == 1 && imgs[i].height == 1) {
                imgs[i].src = imgSrc;
            }
        } else if (imgs[i].className == 'amazon_pict') {
            imgs[i].src = imgSrc;
        }
    }
}
amazonNoImg('http://egotopia.boo.jp/images/amzon_no_image.gif');