gistfile1.txt

var filename = "https://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js";
test("Lazy-load jQuery", function()
{
  stop(3000);
  loadScript(filename, function() {
    start();
    ok(/loaded|complete/.test(document.readyState), "document is complete");
    ok(typeof $ == "function", "$ is a function");
    ok(typeof jQuery == "function", "jQuery is a function");
  });
});

function loadScript(filename, callback)
{
  
  var script = document.createElement('script')
  script.setAttribute("type","text/javascript")
  script.setAttribute("src", filename)
  if (typeof script!="undefined")
  document.getElementsByTagName("head")[0].appendChild(script);

  var interval = setInterval(function()
    {
      if (/loaded|complete/.test(document.readyState))
      {
        clearInterval(interval);
        callback();
      }
    }, 10);
}