To extract the image src, it is recommended to use entry.content instead of media$thumbnail
Consider this alternative approach
<script type='text/javascript'>
//<![CDATA[
// JS LQ
var defaultnoimage = "http://1.bp.blogspot.com/_u4gySN2ZgqE/SosvnavWq0I/AAAAAAAAArk/yL95WlyTqr0/s400/noimage.png";
var maxresults = 8;
var splittercolor = "#d4eaf2";
var relatedpoststitle = "YOU MIGHT WANT TO SEE";
var relatedTitles = new Array();
var relatedTitlesNum = 0;
var relatedUrls = new Array();
var thumburl = new Array();
function related_results_labels_thumbs(json) {
for (var i = 0; i < json.feed.entry.length; i++) {
var entry = json.feed.entry[i];
relatedTitles[relatedTitlesNum] = entry.title.$t;
s = entry.content.$t;
a = s.indexOf("<img");
b = s.indexOf("src=\", a);
c = s.indexOf("\", b + 5);
d = s.substr(b + 5, c - b - 5);
if ((a != -1) && (b != -1) && (c != -1) && (d != "")) {
thumburl[relatedTitlesNum] = d;
} else {
if (typeof(defaultnoimage) !== 'undefined') {
thumburl[relatedTitlesNum] = defaultnoimage;
} else {
thumburl[relatedTitlesNum] = "http://1.bp.blogspot.com/_u4gySN2ZgqE/SosvnavWq0I/AAAAAAAAArk/yL95WlyTqr0/s400/noimage.png";
}
}
if (relatedTitles[relatedTitlesNum].length > 35) {
relatedTitles[relatedTitlesNum] = relatedTitles[relatedTitlesNum].substring(0, 150) + "...";
}
for (var k = 0; k < entry.link.length; k++) {
if (entry.link[k].rel == 'alternate') {
relatedUrls[relatedTitlesNum] = entry.link[k].href;
relatedTitlesNum++;
}
}
}
}
function removeRelatedDuplicates_thumbs() {
var tmp = new Array(0);
var tmp2 = new Array(0);
var tmp3 = new Array(0);
for (var i = 0; i < relatedUrls.length; i++) {
if (!contains_thumbs(tmp, relatedUrls[i])) {
tmp.length += 1;
tmp[tmp.length - 1] = relatedUrls[i];
tmp2.length += 1;
tmp3.length += 1;
tmp2[tmp2.length - 1] = relatedTitles[i];
tmp3[tmp3.length - 1] = thumburl[i];
}
}
relatedTitles = tmp2;
relatedUrls = tmp;
thumburl = tmp3;
}
function contains_thumbs(a, e) {
for (var j = 0; j < a.length; j++) {
if (a[j] == e) {
return true;
}
}
return false;
}
function printRelatedLabels_thumbs(current) {
var splitbarcolor;
if (typeof(splittercolor) !== 'undefined') {
splitbarcolor = splittercolor;
} else {
splitbarcolor = "#d4eaf2";
}
for (var i = 0; i < relatedUrls.length; i++) {
if ((relatedUrls[i] == current) || (!relatedTitles[i])) {
relatedUrls.splice(i, 1);
relatedTitles.splice(i, 1);
thumburl.splice(i, 1);
i--;
}
}
var r = Math.floor((relatedTitles.length - 1) * Math.random());
var i = 0;
if (relatedTitles.length > 0) {
document.write('<div class="phimlq"><i class="lq"></i>' + relatedpoststitle + '</div>');
}
document.write('<div style="clear: both;"/>');
while (i < relatedTitles.length && i < 20 && i < maxresults) {
document.write('<a href="' + relatedUrls[r] + '"><div class="popular-row"><div class="in-article"><div class="wrap-photos"><img class="ppl-img" src="' + thumburl[r].replace("/s72-c/", "/s200/") + '"/></div><h3 name="title">' + relatedTitles[r] + ']</h3><span class="icon-hover"></span><div class="br"></div></div></div></a>');
i++;
if (r < relatedTitles.length - 1) {
r++;
} else {
r = 0;
}
}
document.write('</div>');
relatedUrls.splice(0, relatedUrls.length);
thumburl.splice(0, thumburl.length);
relatedTitles.splice(0, relatedTitles.length);
}
//]]>
</script>