Periodically update time when element was added with moment.js

gistfile1.txt

<script type="text/javascript">
    $(document).ready(function() {
         var update = function() {
             $('time').each(function() {
                 date = moment(new Date($(this).attr("datetime")));
                 $(this).html(date.fromNow());
             });
         };
         update();
         setInterval(update, 1000 * 60);
    }); 
</script>