piacter.user.js

// ==UserScript==
// @name            Piacter improvements
// @namespace       http://lackac.hu
// @description     Normalisabb kepkezeles piacteren
// @include         http://piacter.bikemag.hu/showproduct.php*
// ==/UserScript==

var GM_jQuery = document.createElement('script');
GM_jQuery.src = 'http://jquery.com/src/jquery-latest.js';
GM_jQuery.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(GM_jQuery);

var GM_lightBox_js = document.createElement('script');
GM_lightBox_js.src = 'http://sehol.se/lightbox/lightbox.js';
GM_lightBox_js.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(GM_lightBox_js);

var GM_lightBox_css = document.createElement('link');
GM_lightBox_css.rel = "stylesheet"
GM_lightBox_css.href = 'http://sehol.se/lightbox/lightbox.css';
GM_lightBox_css.type = 'text/css';
document.getElementsByTagName('head')[0].appendChild(GM_lightBox_css);

(function() {
  if (unsafeWindow.jQuery === undefined || unsafeWindow.jQuery.fn.lightBox === undefined) {
    window.setTimeout(arguments.callee, 100);
  } else {
    init(unsafeWindow.jQuery)
  }
})();

function init($) {
  $('td.small').find('a:first img').each(function() {
    var src = $(this).attr('src');
    var newLink = $('<a href="'+src.replace('/thumbs', '/large')+'" class="bike-image"><img src="'+src.replace('/thumbs', '')+'"/></a>');
    $(this).parents('td.small:first').html('').append(newLink);
  });
  $('a.bike-image').lightBox();
}