ANN Image Replacer

ann_image_replacer.js

// ==UserScript==
// @name         ANN Image Replacer
// @namespace    http://scripts.social48.net
// @version      0.1
// @description  Replace small images from ANN with large ones.
// @author       Social48
// @include      http://www.allnightnippon.com/wp/assets/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';
    
    function redirect(new_url) {
        // get rid of image so it won't load twice
        var images = document.getElementsByTagName('img');
        if (images.length > 0) {
            images[0].parentNode.removeChild(images[0]);
        }

        window.location.replace(new_url);
    }
    
    var url = window.location.href;
    var img_re = /(http:\/\/www\.allnightnippon\.com\/wp\/assets\/uploads\/20\d+\/\d+\/img_\d+)-\d+x\d+(\.jpg)/i;
    if (img_re.test(url)) {
        redirect(url.replace(img_re, "$1$2"));
    }
})();