Injetanto jQuery do Google

jquery_inject_google.js

(function() {
  var script = document.createElement("script");
  script.src = "//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js";
  script.onload = script.onreadystatechange = function(){ console.log("done;"); };
  document.body.appendChild(script);
})();