This document contains JavaScript code to retrieve the top commentators on a blog and display their avatars, names, and number of comments. It makes API calls to fetch comment data, filters out excluded users, calculates comment counts, sorts the results, and replaces variables in an HTML template to display the top commentators.

1. <style type="text/css">
.top-commentators {
margin: 3px 0;
border-bottom: 1px dotted #ccc;
}
.avatar-top-commentators {
vertical-align:middle;
border-radius: 30px;
}
.top-commentators .commenter-link-name {
padding-left:0;
}
</style>
<script type="text/javascript">
var maxTopCommenters = 8;
var minComments = 1;
var numDays = 0;
var excludeMe = true;
var excludeUsers = ["Anonymous", "someotherusertoexclude"];
var maxUserNameLength = 42;
//
var txtTopLine = '<b>[#].</b> [image] [user] ([count])';
var txtNoTopCommenters = 'No top commentators at this time.';
var txtAnonymous = '';
//
var sizeAvatar = 33;
var cropAvatar = true;
//
var urlNoAvatar = "http://2.bp.blogspot.com/-pWdg8wLsedo/UmVWQxLdwrI/AAAAAAAAEVk/-
z7YgKykkuU/s1600/avatar_blue_m_96.png" + sizeAvatar;
var urlAnoAvatar = 'http://1.bp.blogspot.com/-6B6DXCp8dek/UmVPm7D2mOI/AAAAAAAAEVU/Xz-3z2nRpUk/s1600/avatar1.png' +
sizeAvatar;
var urlMyProfile = '';
var urlMyAvatar = '';
if(!Array.indexOf) {
Array.prototype.indexOf=function(obj) {
for(var i=0;i<this.length;i++) if(this[i]==obj) return i;
return -1;
}}
function replaceTopCmtVars(text, item, position)
{
if(!item || !item.author) return text;
var author = item.author;
var authorUri = "";
if(author.uri && author.uri.$t != "")
authorUri = author.uri.$t;
var avaimg = urlAnoAvatar;
var bloggerprofile = "http://www.blogger.com/profile/";
if(author.gd$image && author.gd$image.src && authorUri.substr(0,bloggerprofile.length) == bloggerprofile)
avaimg = author.gd$image.src;
else {
var parseurl = document.createElement('a');
if(authorUri != "") {
parseurl.href = authorUri;
avaimg = 'http://www.google.com/s2/favicons?domain=' + parseurl.hostname;
}
}
if(urlMyProfile != "" && authorUri == urlMyProfile && urlMyAvatar != "")
avaimg = urlMyAvatar;
if(avaimg == "http://img2.blogblog.com/img/b16-rounded.gif" && urlNoAvatar != "")
avaimg = urlNoAvatar;
var newsize="s"+sizeAvatar;
avaimg = avaimg.replace(//sdd+-c//, "/"+newsize+"-c/");
if(cropAvatar) newsize+="-c";
avaimg = avaimg.replace(//sdd+(-c){0,1}//, "/"+newsize+"/");
var authorName = author.name.$t;
if(authorName == 'Anonymous' && txtAnonymous != '' && avaimg == urlAnoAvatar)
authorName = txtAnonymous;
var imgcode = '<img class="avatar-top-commentators" height="'+sizeAvatar+'" width="'+sizeAvatar+'" title="'+authorName+'"

2. src="'+avaimg+'" />';
if(authorUri!="") imgcode = '<a href="'+authorUri+'">'+imgcode+'</a>';
if(maxUserNameLength > 3 && authorName.length > maxUserNameLength)
authorName = authorName.substr(0, maxUserNameLength-3) + "...";
var authorcode = authorName;
if(authorUri!="") authorcode = '<a class="commenter-link-name" href="'+authorUri+'">'+authorcode+'</a>';
text = text.replace('[user]', authorcode);
text = text.replace('[image]', imgcode);
text = text.replace('[#]', position);
text = text.replace('[count]', item.count);
return text;
}
var topcommenters = {};
var ndxbase = 1;
function showTopCommenters(json) {
var one_day=1000*60*60*24;
var today = new Date();
if(urlMyProfile == "") {
var elements = document.getElementsByTagName("*");
var expr = /(^| )profile-link( |$)/;
for(var i=0 ; i<elements.length ; i++)
if(expr.test(elements[i].className)) {
urlMyProfile = elements[i].href;
break;
}
}
if(json && json.feed && json.feed.entry && json.feed.entry.length) for(var i = 0 ; i < json.feed.entry.length ; i++ ) {
var entry = json.feed.entry[i];
if(numDays > 0) {
var datePart = entry.published.$t.match(/d+/g);
var cmtDate = new Date(datePart[0],datePart[1]-1,datePart[2],datePart[3],datePart[4],datePart[5]);
var days = Math.ceil((today.getTime()-cmtDate.getTime())/(one_day));
if(days > numDays) break;
}
var authorUri = "";
if(entry.author[0].uri && entry.author[0].uri.$t != "")
authorUri = entry.author[0].uri.$t;
if(excludeMe && authorUri != "" && authorUri == urlMyProfile)
continue;
var authorName = entry.author[0].name.$t;
if(excludeUsers.indexOf(authorName) != -1)
continue;
var hash=entry.author[0].name.$t + "-" + authorUri;
if(topcommenters[hash])
topcommenters[hash].count++;
else {
var commenter = new Object();
commenter.author = entry.author[0];
commenter.count = 1;
topcommenters[hash] = commenter;
}
}
if(json && json.feed && json.feed.entry && json.feed.entry.length && json.feed.entry.length == 200) {
ndxbase += 200;
document.write('<script type="text/javascript"
src="http://'+window.location.hostname+'/feeds/comments/default?redirect=false&max-results=200&start-
index='+ndxbase+'&alt=json-in-script&callback=showTopCommenters"></'+'script>');
return;
}
// convert object to array of tuples
var tuplear = [];
for(var key in topcommenters) tuplear.push([key, topcommenters[key]]);
tuplear.sort(function(a, b) {
if(b[1].count-a[1].count)
return b[1].count-a[1].count;
return (a[1].author.name.$t.toLowerCase() < b[1].author.name.$t.toLowerCase()) ? -1 : 1;
});
var realcount = 0;

3. for(var i = 0; i < maxTopCommenters && i < tuplear.length ; i++) {
var item = tuplear[i][1];
if(item.count < minComments)
break;
document.write('<di'+'v class="top-commentators">');
document.write(replaceTopCmtVars(txtTopLine, item, realcount+1));
document.write('</d'+'iv>');
realcount++;
}
if(!realcount)
document.write(txtNoTopCommenters);
}
document.write('<script type="text/javascript"
src="http://'+window.location.hostname+'/feeds/comments/default?redirect=false&max-results=200&alt=json-in-
script&callback=showTopCommenters"></'+'script>');
</script>