A Blogger HTML/JavaScript gadget to add line number to gists, requires jQuery

gistfile1.html

<!-- add line number to gist -->
<script type="text/javascript">
$('.gist').each(function() {
  $('.line',this).each(function(i, e) {
    $(this).prepend(
      $('<div/>').attr('unselectable','on').css({
        'float' : 'left',
        'width': '30px',
        'font-weight' : 'bold',
        'color': 'grey',
        '-moz-user-select': 'none',
        '-webkit-user-select': 'none'
      }).text(++i)
    );
  });
});
</script>