// ==UserScript==
// @name        To the top
// @namespace   kkkodex
// @include     *rpgcodex.net/forums/index.php?threads/*
// @version     1.0
// ==/UserScript==

document.addEventListener('DOMContentLoaded', function(ev) {
    var docUrl = document.URL.split('#')[0];
    var messages = document.getElementsByTagName('li');

    for (var i = 0; i < messages.length; ++i) {
    var msg = messages[i];
        if (msg.hasAttribute('class') && msg.getAttribute('class').indexOf('message') != -1) {
            var wat = msg.getElementsByTagName('div');
            var postId = msg.getAttribute('id')

            for (var j = 0; j < wat.length; ++j) {
                if (wat[j].getAttribute('class').indexOf('primaryContent') != -1) {
                    (function(msg) {
                        this.style.textAlign = 'center';

                        var txt = document.createTextNode('↑ To the top ↑');
                        var link = document.createElement('a');
                        link.href = docUrl + '#' + postId;

                        link.appendChild(txt);
                        this.appendChild(link);
                        msg.appendChild(this);
                }).apply(document.createElement('div'), [wat[j]]);

                    break;
                }
            }
        }
    }
}, false);