Your jQuery:

  $(document).ready(function() {
    $.ajax({
      url: "test.html",
      context: document.body
    }).done(function() {
      $(this).addClass("done");
    })
  });

Without jQuery:

  var oReq = new XMLHttpRequest();
  oReq.onreadystatechange = function() {if (this.readyState === 4) {
     window.document.body.className += " done";
  }};
  oReq.open("GET", "test.html", true);
  oReq.send();

Screenshots (blue indicates successful ajax):

without jQuery: http://browsershots.org/http://evening-harbor-8654.herokuapp...

with jQuery: http://browsershots.org/http://evening-harbor-8654.herokuapp...