別人だが
for (let attr of ['data-src', 'data-original', 'data-lazy-src', 'data-thumb', 'data-image', 'data-mediumthumb', 'ajax']) {
document.querySelectorAll('.autopagerize_page_info~* img[' + attr + ']').forEach(function (img) {
img.setAttribute('src', img.getAttribute(attr));
});
}