Asynchronous Javascript Loading

Read a good article today at http://engineeredweb.com/blog/non-blocking-script-loading-drupal/. It's a Drupal article, but really, it's good practice to avoid third party scripts linked in the body no matter the platform. Here's the code:

<script type="text/javascript">
  var sNew = document.createElement("script");
  sNew.async = true;
  sNew.src = "http://example.com/file.js";
  var s0 = document.getElementsByTagName("script")[0];
  s0.parentNode.insertBefore(sNew, s0);
</script>
<script type="text/javascript">
  var sNew = document.createElement("script");
  sNew.async = true;
  sNew.src = "http://example.com/file.js";
  var s0 = document.getElementsByTagName("script")[0];
  s0.parentNode.insertBefore(sNew, s0);
</script>

Just drop it near the body's closing tag.