Listing 5. The browser must be registered with the Gauger Web site
before Gauger can be invoked from JavaScript.
Once the login cookie is set, the main difference from other
languages is that the JavaScript code must supply its revision number
explicitly.

[...]
<script type="text/javascript"
  src="http://www.example.com/gauger.js">
</script>
[...]
 var rev = $Revision$;
 /* or */
 var rev = <?php echo get_revision() ?>;
 var performance = do_test();
 GAUGER ('CAT', 'NAME',
         performance, 'kb/s', rev)" />
[...]