BabyBadger.user.js

// ==UserScript==
// @name         Baby Badger Bootstrapper
// @namespace    BabyBadge
// @include      *
// @author       Dan Diebolt
// @description  Embeds thumbnail of baby on every page
// ==/UserScript==

// a function that loads jQuery and calls a callback function when jQuery has finished loading
function addJQuery(callback) {
  var script = document.createElement("script");
  script.setAttribute("src", "http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js");
  script.addEventListener('load', function() {
    var script = document.createElement("script");
    script.textContent = "(" + callback.toString() + ")();";
    document.body.appendChild(script);
  }, false);
  document.body.appendChild(script);
}

function main() {
    $("<img>").attr({
     src: "http://distillery.s3.amazonaws.com/media/2011/10/19/6cb52a68db1b4a9bbed164f84843bf6e_7.jpg",
     width: 100, 
     height: 100
    }).prependTo("body:first").css({position: "fixed", top: "0px", right: "0px","z-index": 100});
}

// load jQuery and execute the main function
addJQuery(main);