allegro_watchlist_reminders.user.js

// ==UserScript==
// @name        Allegro Watchlist reminders
// @namespace   leafnode
// @description Add button to enable reminders on all auctions
// @include     http://allegro.pl/myaccount/watch.php
// @version     1
// @grant       none
// @require     http://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js
// ==/UserScript==

window.addEventListener("load", function(e) {
  window.tickButtons = function(email, gg) {
    var email = typeof email !== 'undefined' ? email : false;
    var gg = typeof gg !== 'undefined' ? gg : false;
    if (email)
      jQuery('.mailInvert:not(:checked)').attr('checked', true);
    if (gg)
      jQuery('.ggInvert:not(:checked)').attr('checked', true);
  }
});

jQuery("#listButtonsMain div").prepend(
  '<img id="tickEmailNotification" style="height:14px" onclick="window.tickButtons(true, false);" title="Zaznacz email" alt="Zaznacz email" src="http://static.allegrostatic.pl/site_images/1/0/invert.gif">Zaznacz email<br />' +
  '<img id="tickGGNotification" style="height:14px" onclick="window.tickButtons(false, true);" title="Zaznacz gg" alt="Zaznacz gg" src="http://static.allegrostatic.pl/site_images/1/0/invert.gif">Zaznacz GG<br />' +
  '<img id="tickAllNotifications" style="height:14px" onclick="window.tickButtons(true, true);" title="Zaznacz wszystko" alt="Zaznacz wszystko" src="http://static.allegrostatic.pl/site_images/1/0/invert.gif">Zaznacz wszystko<br />'
);