Shuffle and limit count of Blogger popular posts

<script type='text/javascript'>
//<![CDATA[
// Shuffle and limit count of Blogger popular posts using jQuery / MS-potilas 2011
// Put this code in a html/javascript gadget or before </body>.
// See http://yabtb.blogspot.com/2011/12/shuffle-and-limit-popular-post-gadget.html
var popcount = 8;
var ul = $('.popular-posts ul');
var lis = $('.popular-posts ul li').detach();
if(lis.length>1) {
  for(var i=lis.length-1;i;i--) {       // fisher-yates/knuth
    var j=parseInt(Math.random()*i);
    lis[j] = lis.splice(i,1,lis[j])[0]; // swap lis[i]&lis[j]
  }
  lis.slice(-popcount).appendTo(ul);
}
//]]>
</script>