gistfile1.js

function loadScript() {
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  script.type = "text/javascript";
  script.src = "http://maps.google.com/maps/api/js?sensor=false&callback=hh.init";
  document.body.appendChild(script);
} 
window.onload = loadScript;

var hh = (function() {
  init: function() {
    console.log('woot');
  }

  return init();
});