official responsive Adsense ad unit format - Async

adsense.html

<style>
.adsense-ad-unit-1 { width: 320px; height: 50px; }
@media(min-width: 500px) { .adsense-ad-unit-1 { width: 468px; height: 60px; } }
@media(min-width: 800px) { .adsense-ad-unit-1 { width: 728px; height: 90px; } }
</style>

<script async src="http://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>

<!-- Adsense Ad Unit 1 -->
<ins class="adsense-ad-unit-1"
     style="display:inline-block"
     data-ad-client="ca-pub-0000000000000"
     data-ad-slot="xxxxxxxxxxx"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>