Thread Navigating by Arrow keys

Use ← or → and Ctrl to navigate to previous, next, first or last page
当前为 2015-01-14 提交的版本，查看最新版本。
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// ==UserScript==
// @name        Thread Navigating by Arrow keys
// @namespace   https://gf.qytechs.cn/scripts/6849-thread-navigating-by-arrow-keys
// @description Use ← or → and Ctrl to navigate to previous, next, first or last page
// @author      theheroofvn
// @include     /^.*(thread|forum|diendan).*$/
// @include 	http://www.vn-zoom.com/*
// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js
// @grant       none
// @version     3.9
// ==/UserScript==
this.$ = this.jQuery = jQuery.noConflict(true);

$(document).ready(function() {
    var detect_forum, prev, next, first, last, up, up_sub = '[itemtype="http://data-vocabulary.org/Breadcrumb"] a';
    if ($('script[src*="vbulletin"]').length > 0) {
        detect_forum = "v";
        prev = 'a[rel="prev"]';
        next = 'a[rel="next"]';
        first = 'a[rel="start"]';
        last = 'a[title^="Last"], a[title*="uối"]';
        up = "span.navbar a, li.navbit a";
    } else if ($('script[src*="xenforo"]').length > 0) {
        detect_forum = "x";
        prev = ".PageNav a.text:first-child";
        next = last = ".PageNav a.text:last-child";
        first = 'a[rel="start"]';
        up = "a.crumb";
    } else return;
    var site_info = [ 
	    {
	        host: "www.webtretho.com",
	        prev: "a.arrowPrePage",
	        next: "a.arrowNextPage",
	        first: "a.arrowFstPage",
	        last: "a.arrowLstPage"
	    } 
    ];
    function custom_site(list) {
        if (list.length === 0) return;
        for (var i = 0; i < list.length; i++) {
            if (location.hostname == list[i].host) {
                prev = list[i].prev;
                next = list[i].next;
                first = list[i].first;
                last = list[i].last;
                return;
            }
        }
    }
    custom_site(site_info);
    var multi = {
        17: false,
        8: false,
        37: false,
        39: false
    }, multi1 = {
        17: false,
        8: false
    }, multi2 = {
        17: false,
        37: false
    }, multi3 = {
        17: false,
        39: false
    };
    var nav = {
        prev: $(prev)[0],
        next: $(next)[0],
        first: $(first)[0],
        last: function() {
            if (detect_forum == "v") return $(last)[0]; else if (detect_forum == "x") return $(last).prev()[0];
        },
        up: function() {
            return $(up).length > 0 ? $(up).last()[0] : $(up_sub).last()[0];
        }
    };
    $(window).keydown(function(event) {
        var key = event.keyCode, action = null, link;
        if (key in multi) multi[key] = true; else return;
        if (key in multi1) {
            if (multi[17] && multi[8]) action = "up";
        } else if (key in multi2) {
            if (!multi[17] && multi[37]) action = "prev"; else if (multi[17] && multi[37]) action = "first";
        } else if (key in multi3) {
            if (!multi[17] && multi[39]) action = "next"; else if (multi[17] && multi[39]) action = "last";
        }
        if (!action || event.target.tagName == "INPUT" || event.target.tagName == "TEXTAREA") return;
        if (typeof nav[action] === "function") link = nav[action](); else link = nav[action];
        window.location = link.href;
    }).keyup(function(event) {
        if (event.keyCode in multi) multi[event.keyCode] = false;
    });
});
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