Better Links 2ch 1.1

// ==UserScript==
// @name         Better Links 2ch
// @namespace    http://akr.tw/
// @description  Fixes the links on 2ch.net BBS. Displays anchor content directly.
// @author       akiratw
// @version      1.1
// @license      MIT License
// @include      http://*.2ch.net/*
// @include      http://*.bbspink.com/*
// @include      http://*.open2ch.net/*
// ==/UserScript==

var init = function (doc) {
    doc = doc || document;

    fixLinks(doc).fix();
    displayAnchor(doc).init();
};

var fixLinks = function (doc) {
    var self = {};

    self.completeLinks = function () {
        var responses = doc.querySelectorAll('dl.thread dd'),
            regex = /(?:[^h])(ttps?:\/\/[\x21-\x7E]+)/ig,
            replace = '<a href="h$1">h$1</a>';

        dom(responses).each(function (response) {
            response.innerHTML = response.innerHTML.replace(regex, replace);
        });
    };

    self.skipLinkRedirect = function () {
        var links = doc.querySelectorAll('dl.thread dd a'),
            regex = /((www\d?\.|)ime\.(nu|st)\/|pinktower\.com\/|jump\.2ch\.net\/\?)/,
            replace = '';

        dom(links).each(function (link) {
            link.setAttribute('href', link.href.replace(regex, replace));
        });
    };

    return {
        fix: function () {
            self.completeLinks();
            self.skipLinkRedirect();
        }
    };
};

var displayAnchor = function (doc) {
    var self = {};

    self.bindEvents = function () {
        var links = doc.querySelectorAll('dl.thread dd a'),
            regex = /^&gt;&gt;\d+$/;

        dom(links).each(function (link) {
            if (!regex.test(link.innerHTML)) return;
            link.addEventListener('click', self.toggleAnchor, false);
        });
    };

    self.toggleAnchor = function (event) {
        event.preventDefault();

        var link = event.target,
            href = link.getAttribute('href'),
            anchor = link.nextSibling;

        if (anchor.tagName === 'DIV' && anchor.getAttribute('class').indexOf('bl2ch_anchor') > -1) {
            dom(anchor).toggle();
            return;
        }

        anchor = document.createElement('div');
        anchor.setAttribute('class', 'bl2ch_anchor');
        anchor.innerHTML = '<strong>Loading...</strong>';

        link.parentNode.insertBefore(anchor, link.nextSibling);

        dom(anchor)
            .addStyle({
                padding: '5px 5px 0 5px',
                borderLeft: '5px solid #CCC',
                color: '#666',
                fontSize: '13px'
            })
            .ajaxLoad(href, 'dl.thread', function() { init(anchor); });
    };

    return {
        init: function () {
            self.bindEvents();
        }
    };
};

var dom = function (dom) {
    return {
        each: function (func, index) {
            for (var i = dom.length - 1; i >= 0; i--) {
                func(dom[i], i);
            }
            return this;
        },
        toggle: function () {
            if (dom.style.display === 'none') {
                dom.style.display = 'block';
            } else {
                dom.style.display = 'none';
            }
            return this;
        },
        addStyle: function(styleArray) {
            for (var prop in styleArray) {
                dom.style[prop] = styleArray[prop];
            }
            return this;
        },
        ajaxLoad: function (url, selector, callback) {
            var xhr = new XMLHttpRequest();
            var charset = document.charset || document.characterSet;

            xhr.onreadystatechange = function () {
                if (xhr.readyState !== 4 || xhr.status !== 200) return;

                var wrapper = document.createElement('div');
                wrapper.innerHTML = xhr.responseText.replace(/<script[^>]*>([\\S\\s]*?)<\/script>/img, '');
                dom.innerHTML = wrapper.querySelectorAll(selector)[0].outerHTML;

                if (typeof callback === 'function') callback();
            };

            xhr.open('GET', url, true);
            xhr.overrideMimeType('text/html; charset=' + charset);
            xhr.send();

            return this;
        }
    };
};

init();