Avoid Document.Write

<script id='polyfill-js'>'IntersectionObserver'in window||document.write('<script src="https://polyfill.io/v3/polyfill.min.js?features=IntersectionObserver"><\/script>');</script>

<b:if cond='data:view.isPost and !data:view.isPreview'>
<div class='pRelate' id='pRelated'>
<script>/*<![CDATA[*/ 
var relatedTitles = new Array(); var relatedTitlesNum = 0; var relatedUrls = new Array(); function related_results_labels(json) { for (var i = 0; i < json.feed.entry.length; i++) { var entry = json.feed.entry[i]; relatedTitles[relatedTitlesNum] = entry.title.$t; for (var k = 0; k < entry.link.length; k++) { if (entry.link[k].rel == 'alternate') {relatedUrls[relatedTitlesNum] = entry.link[k].href; relatedTitlesNum++; break;}}}} function removeRelatedDuplicates() { var tmp = new Array(0); var tmp2 = new Array(0); for(var i = 0; i < relatedUrls.length; i++) { if(!contains(tmp, relatedUrls[i])) { tmp.length += 1; tmp[tmp.length - 1] = relatedUrls[i]; tmp2.length += 1; tmp2[tmp2.length - 1] = relatedTitles[i];}} relatedTitles = tmp2; relatedUrls = tmp;} function contains(a, e) { for(var j = 0; j < a.length; j++) if (a[j]==e) return true; return false;} function printRelatedLabels() { var r = Math.floor((relatedTitles.length - 1) * Math.random()); var i = 0; document.write('<ul>'); while (i < relatedTitles.length && i < 20) { document.write('<li><a href="' + relatedUrls[r] + '">' + relatedTitles[r] + '</a></li>'); if (r < relatedTitles.length - 1) { r++; } else { r = 0;} i++;} document.write('</ul>');} /*]]>*/</script>
<b:if cond='data:post.labels'>
<b:loop index='i' values='data:post.labels' var='label'>
<b:if cond='data:i&lt;1'>
<script expr:src='&quot;/feeds/posts/default/-/&quot; + data:label.name + &quot;?alt=json-in-script&amp;callback=related_results_labels&amp;max-results=3&quot;' rel='preload'/>
</b:if>
</b:loop>
</b:if>
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<script>removeRelatedDuplicates(); printRelatedLabels();</script>
</div>
<script>/*<![CDATA[*/ function insertAfter(tbh,tgt) {var prt = tgt.parentNode; if (prt.lastChild == tgt) {prt.appendChild(tbh);} else {prt.insertBefore(tbh,tgt.nextSibling);}} var tgt = document.getElementById("postBody");var midAd3 = document.getElementById("pRelated"); var showAd3 = tgt.getElementsByTagName("p"); if (showAd3.length > 0) {insertAfter(midAd3,showAd3[3]);}; /*]]>*/</script>
</b:if>