Sort Hackernews comments by number of replies

hn-comment-sort.js

var commentTree = document.getElementsByClassName('comment-tree')[0].getElementsByTagName('tbody')[0];
var colls = document.getElementsByClassName('comtr');

var newColls = []
for(var i=0; i<colls.length; i++) {
	newColls.push(colls[i])
}

newColls.sort(function(a,b) {
	var counta = parseInt(a.getElementsByClassName('togg')[0].getAttribute('n'), 10)
	var countb = parseInt(b.getElementsByClassName('togg')[0].getAttribute('n'), 10)
	return counta == countb ? 0 : (counta > countb ? -1 : 1)
});

commentTree.innerHTML = "";
for(var i=0; i<newColls.length; i++) {
	commentTree.appendChild(newColls[i]);
}