/*! loadJS: load a JS file asynchronously. [c]2014 @scottjehl, Filament Group, Inc. (Based on http://goo.gl/REQGQ by Paul Irish). Licensed MIT */
(function(w) {
  var loadJS = function(src, cb) {
    'use strict';
    var ref = w.document.getElementsByTagName('script')[0];
    var script = w.document.createElement('script');
    script.src = src;
    script.async = true;
    ref.parentNode.insertBefore(script, ref);
    if (cb && typeof cb === 'function') {
      script.onload = cb;
    }
    return script;
  };
  // commonjs
  if (typeof module !== 'undefined') {
    module.exports = loadJS;
  } else {
    w.loadJS = loadJS;
  }
})(typeof global !== 'undefined' ? global : this);