if (window.location.search == '') {

  // add tweet buttons
  // (adapated from https://twitter.com/about/resources/buttons)
  (function() {
    var self = document.getElementsByTagName('script')[0];
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.async = true;
    script.src = '//platform.twitter.com/widgets.js';
    self.parentNode.insertBefore(script, self);
  })();


  // add g+1 buttons
  // (adapted from https://developers.google.com/+/web/+1button)
  (function() {
    var self = document.getElementsByTagName('script')[0];
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.async = true;
    script.src = 'https://apis.google.com/js/plusone.js';
    self.parentNode.insertBefore(script, self);
  })();

}
