google analytics async tag sorten

ga_shorten.js

(function(d, t ,s) { 
  var js,ga = d.createElement(t);
  ga.type = 'text/javascript'; ga.async = true; ga.src = '//' + s; 
  js = d.getElementsByTagName(t)[0]; js.parentNode.insertBefore(ga, js);
})(document, 'script', 'google-analytics.com/ga.js');