run this in your browser's javascript console, then jQuery should be available... (from http://stackoverflow.com/questions/7474354/include-jquery-in-the-javascript-console)

add_jquery_via_console.js

var jq = document.createElement('script');
jq.src = "http://code.jquery.com/jquery-latest.min.js";
document.getElementsByTagName('head')[0].appendChild(jq);
jQuery.noConflict();