Google Ad Manager Responsive

<script type="text/javascript">
var gptadslots = [];
var googletag = googletag || {};
googletag.cmd = googletag.cmd || [];
(function() {
var gads = document.createElement('script');
gads.async = true;
gads.type = "text/javascript";
var useSSL = "https:" == document.location.protocol;
gads.src = (useSSL ? "https:" : "http:") + "//www.googletagservices.com/tag/js/gpt.js";
var node = document.getElementsByTagName("script")[0];
node.parentNode.insertBefore(gads, node);
})();
</script>
<script>
var gptAdSlots = [];
googletag.cmd.push(function() {

/* header */
var mappingheader = googletag.sizeMapping().
addSize([1248, 0], [[728, 90], [970, 90]]).
addSize([1000, 690], [[728, 90], [970, 90]]).build();

/* top */
var mappingtop = googletag.sizeMapping().
addSize([1248, 0], [300, 250]).
addSize([1000, 690], [300, 250]).
addSize([320, 0], [320, 50]).build();

/* middle */
var mappingmiddle = googletag.sizeMapping().
addSize([1248, 0], [300, 600], [300, 250]).
addSize([1000, 690], [[300, 600],[300, 250]]).
addSize([320, 0], [320, 50]).build();

/* bottom */
var mappingbottom = googletag.sizeMapping().
addSize([1248, 0], [300, 250]).
addSize([1000, 690], [300, 250]).
addSize([320, 0], [320, 50]).build();

/* footer */
var mappingfooter = googletag.sizeMapping().
addSize([1248, 0], [970, 90]).
addSize([1000, 690], [[728, 90],[970, 90]]).
addSize([320, 0], [320, 50]).build();

/* header */
gptAdSlots[1] = googletag.defineSlot('/45051028/aeon-header-gadm', [[728, 90], [970, 90]],
'div-gpt-ad-1550251905755-0').defineSizeMapping(mappingheader).addService(googletag.pubads());
googletag.pubads().setTargeting("doubleclick","responsive");

/* top */
gptAdSlots[2] = googletag.defineSlot('/45051028/aeon-top-gadm', [[300, 250], [320, 50]],
'div-gpt-ad-1550252129049-0').defineSizeMapping(mappingtop).addService(googletag.pubads());
googletag.pubads().setTargeting("doubleclick","responsive");

/* middle */
gptAdSlots[3] = googletag.defineSlot('/45051028/aeon-middle-gadm', [[300, 250], [300, 600], [320, 50]],
'div-gpt-ad-1550252642909-0').defineSizeMapping(mappingmiddle).addService(googletag.pubads());
googletag.pubads().setTargeting("doubleclick","responsive");

/* bottom */
gptAdSlots[4] = googletag.defineSlot('/45051028/aeon-bottom-gadm', [[300, 250], [320, 50]],
'div-gpt-ad-1550254373578-0').defineSizeMapping(mappingbottom).addService(googletag.pubads());
googletag.pubads().setTargeting("doubleclick","responsive");

/* footer */
gptAdSlots[5] = googletag.defineSlot('/45051028/aeon-footer-gadm', [[320,50], [728,90], [970,90]],
'div-gpt-ad-1550253744049-0').defineSizeMapping(mappingfooter).addService(googletag.pubads());
googletag.pubads().setTargeting("doubleclick","responsive");

googletag.pubads().enableSingleRequest();
googletag.pubads().collapseEmptyDivs();
googletag.enableServices();
});
</script>