This userscript is meant to be an example on how to use jQuery in a userscript on Google Chrome.

jQueryForChromeExample.user.js

// ==UserScript==
// @name         helpers
// @namespace    anfedorov
// @include      *
// @author       Andrey Fedorov
// @description  
// ==/UserScript==

function load(library) {
  var script = document.createElement("script");
  script.setAttribute("src", library);
  document.body.appendChild(script);
}

function load_jQuery(callback) {
  var script = document.createElement("script");
  script.setAttribute("src", "http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js");
  document.body.appendChild(script);
}



jQuery("a.q1[href*=item=]").map(
    function () {
        $(this).attr(
            'href', 
            "http://theunderminejournal.com/item.php?realm=A-Aerie%20Peak&item=" + $(this).attr('href').match("/item=([0-9]+)$")[1]
        );
    }
)