Better way to add Facebook, Twitter, Google Plus and any other external scripts

external_social

<script type="text/javascript">
 // By Kasper Mikiewicz @ http://blog.idered.pl/post/better-way-to-add-facebook-twitter-google-plus-and-any-other-external-scripts
 
  var scripts = {
    'facebook-jssdk': '//connect.facebook.net/en_US/all.js#xfbml=1',
    'googleplus'    : 'https://apis.google.com/js/plusone.js',
    'twitter-wjs'   : '//platform.twitter.com/widgets.js',
    'analytics'     : ('https:'==location.protocol?'//ssl':'//www') + '.google-analytics.com/ga.js'
  }, script, _gaq=[['_setAccount','UA-XXXXX-X'],['_trackPageview']];

  for (var id in scripts) {
    script = document.createElement('script'); script.src = scripts[id];
    script.id = id;script.type = 'text/javascript'; script.async = true;
    (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(script);
  }
</script>