Using with Google Analytics

As on twitter.com:

          <script type="text/javascript">
          var _gaq = _gaq || [];
          _gaq.push(['_setAccount', 'UA-XXXXX-X']);
          _gaq.push(
            ['_trackPageview'],
            ['_setDomainName', 'twitter.com']
          );

          (function() {
            var ga = document.createElement('script');
            ga.type = 'text/javascript';
            ga.async = true;
            ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
            var s = document.getElementsByTagName('script')[0];
            s.parentNode.insertBefore(ga, s);
          }());
          </script>
      

Which can be reduced to:

          <script>
          var _gaq=[['_setAccount','UA-XXXX-X'],['_trackPageview'],['_setDomainName','twitter.com']];
          (function(d,t){
              var g=d.createElement(t),s=d.getElementsByTagName(t)[0];
              g.async=1;
              g.src='//www.google-analytics.com/ga.js';
              s.parentNode.insertBefore(g,s)
          }(document,'script'));
          </script>
      

And with $script.js:

          <script>
          $script("//www.google-analytics.com/ga.js", function(){
              var t = _gat._getTracker ("UA-XXXXX-X");
              t._setDomainName("twitter.com");
              //t._initData();
              t._trackPageview();
          });
          </script>