Change the default Javascript library on jsFiddle to jQuery

jsfiddle.changedefault.user.js

// ==UserScript==
// @match http://jsfiddle.net/*
// ==/UserScript==
// @author: John K. Paul @johnkpaul
// @license: http://www.opensource.org/licenses/MIT
// http://johnkpaul.tumblr.com/post/21030300518/changing-jsfiddles-default-library-to-jquery

(function(){

    var script = document.createElement('script');
    script.appendChild(document.createTextNode('('+ main +')();'));
    document.body.appendChild(script);

    //written in mootools out of respect to Piotr Zalewa :)
    function main(){
        var js_lib = document.id('js_lib'),
            is_root = new URI(window.location).get('directory') === '/',
            jq_opt_group = js_lib.getElement("[label=jQuery]"),
            latest_jq_val = jq_opt_group.getElement(">").value;

        if(is_root){
            js_lib.value = latest_jq_val;
        }
    }
}())