Unwatch resources @ SpigotMC

// ==UserScript==
// @name         SpigotMC - Unwatch resources
// @namespace    http://www.sylvcraft.com
// @version      0.1
// @description  Allows you to easily unwatch all resources on a page
// @author       Strahan
// @match        https://www.spigotmc.org/resources/watched
// @icon         https://www.google.com/s2/favicons?domain=spigotmc.org
// @grant        none
// ==/UserScript==

var button = document.createElement("button");
button.innerHTML = "Unwatch All";
button.style.padding = "5px 10px";
button.style.float = "right";
button.onclick = function() { unwatchAll(); };

var h1 = document.getElementsByTagName("h1")[0];
h1.appendChild(button);

function unwatchAll() {
    var inputs = document.getElementsByTagName("input");
    for (var x=0; x<inputs.length; x++) {
        if (inputs[x].type != "checkbox") continue;

        inputs[x].checked = true;
    }

    for (x=0; x<document.forms.length; x++) {
        var sel = document.forms[x].do;
        if (sel == null) continue;

        sel.value = 'stop';
        document.forms[x].submit();
        break;
    }
}