JavaScript Responsive Google Ads

<script type="text/javascript">
    var width = window.innerWidth
        || document.documentElement.clientWidth
        || document.body.clientWidth;
    google_ad_client = "ca-pub-вашето-ID-тук";
    if (width > 800) {
        // Load the Leaderboard 728x90 Unit for wide screen
        google_ad_slot = "вашият-Идент.№";
        google_ad_width = 728;
        google_ad_height = 90;
    } else if ((width < 800) && (width > 400)) {
        // For small screens, load the 468x60 banner
        google_ad_slot = "вашият-Идент.№";
        google_ad_width = 468;
        google_ad_height = 60;
    } else {
        // Load the 234x60 half banner
        google_ad_slot = "вашият-Идент.№";
        google_ad_width = 234;
        google_ad_height = 60;
    }
</script>
<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>