Load external js file in Drupal 6

I found this little snippet today and what a help it is. Put this in your template.php file and you can load JavaScript files from an external source.

$external_js = 'http://www.example.com/a.js';
drupal_add_js('document.write(unescape("%3Cscript src=\''. 
$external_js . 
'\' type=\'text/javascript\'%3E%3C/script%3E"));', 'inline');

*Note: I formated the above to display correctly on this page.