Load JavaScripts from a URL.

loadScripts.js

if (!window.loadScripts) {
  /**
   * Load scripts given an array of URLs.
   * @author Amir Khawaja <[email protected]>
   * @license MIT
   * @param {array} scripts - An array of URLs of scripts.
   * @param {function} done - The function to call once the scripts are loaded.
   */
  window.loadScripts = function (scripts, done) {
    var loader = function (src, handler) {
      var script = document.createElement('script');
      script.src = src;
      script.onload = script.onreadystatechange = function () {
        script.onreadystatechange = script.onload = null;
        handler();
      };
      var head = document.getElementsByTagName('head')[0];
      (head || document.body).appendChild(script);
    };
    (function run() {
      if (scripts.length != 0) {
        loader(scripts.shift(), run);
      } else {
        done && done();
      }
    })();
  }
}