adsense responsive code from: https://support.google.com/adsense/answer/1354736?hl=en&topic=1271508&ctx=topic#sourceid=aso&subid=ww-en-et-asblog_2013-05-23&medium=link

adsense code responsive

<script type="text/javascript">
    google_ad_client = "ca-publisher-id";
    width = document.documentElement.clientWidth;
    google_ad_slot = "1234567890";
    google_ad_width = 320;
    google_ad_height = 50;
        if (width > 500) {
        google_ad_slot = "3456789012";
        google_ad_width = 468;
        google_ad_height = 60;
    }
    if (width > 800) {
        google_ad_slot = "2345678901";
        google_ad_width = 728;
       google_ad_height = 90;
    }

</script>
<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>