Thanks to every one who tried to help but have solved the issue myself. I am posting the code as well.
@Choco
Plzz tell me exactly what shud i do to increase traffic and also become more visible on search engines.
Here is the code. Change the numcomments to whatever u want.
<script style="text/javascript">function showrecentcomments(json) { var numcomments = 3; var showcommentdate = true; var showposttitle = true; var numchars = 20;for (var i = 0; i < numcomments; i++) { var entry = json.feed.entry[i]; var alturl; if (i == json.feed.entry.length) break;for (var k = 0; k < entry.link.length; k++) { if (entry.link[k].rel == 'alternate') { alturl = entry.link[k].href; break; } } alturl = alturl.replace("#", "#comment-"); var postlink = alturl.split("#"); postlink = postlink[0]; var linktext = postlink.split("/"); linktext = linktext[5]; linktext = linktext.split(".html"); linktext = linktext[0]; var posttitle = linktext.replace(/-/g," "); posttitle = posttitle.link(postlink); var commentdate = entry.published.$t; var cdyear = commentdate.substring(0,4); var cdmonth = commentdate.substring(5,7); var cdday = commentdate.substring(8,10); var monthnames = new Array(); monthnames[1] = "Jan"; monthnames[2] = "Feb"; monthnames[3] = "Mar"; monthnames[4] = "Apr"; monthnames[5] = "May"; monthnames[6] = "Jun"; monthnames[7] = "Jul"; monthnames[8] = "Aug"; monthnames[9] = "Sep"; monthnames[10] = "Oct"; monthnames[11] = "Nov"; monthnames[12] = "Dec"; if ("content" in entry) { var comment = entry.content.$t;} else if ("summary" in entry) { var comment = entry.summary.$t;} else var comment = "";var re = /<\S[^>]*>/g; comment = comment.replace(re, "");document.write('<br/>'); if (showcommentdate == true) document.write('On ' + monthnames[parseInt(cdmonth,10)] + ' ' + cdday + ' ');document.write('<a href="' + alturl + '">' + entry.author[0].name.$t + '</a> commented'); if (showposttitle == true) document.write(' on ' + posttitle);document.write('<br/>');if (comment.length < numchars) {document.write('<i>'); document.write(comment);document.write('</i>');} else {document.write('<i>'); comment = comment.substring(0, numchars); var quoteEnd = comment.lastIndexOf(" "); comment = comment.substring(0, quoteEnd);document.write(comment + '...<a href="' + alturl + '">(more)</a>');document.write('</i>');}document.write('<br/>'); }document.write('<br/>');}</script>