Simple Script Loader

scriptloader.js

/* Script loader
 * scriptloader.js
 *
 * A simple Javascript script loader
 * Created by Theo Despoudis
 * (c) 2014 Theo Despoudis.  MIT open-source license.
 */


function loadScript(url, callback) {
    var script = document.createElement("script");
    script.type = "text/javascript";

    if (script.readyState) { //IE
      script.onreadystatechange = function () {
        if (script.readyState == "loaded" || script.readyState == "complete") {
          script.onreadystatechange = null;
          callback();
        }
      };
    } else { //Others
      script.onload = function () {
        callback();
      };
    }

    script.src = url;
    document.getElementsByTagName("head")[0].appendChild(script);
  }