$(document).ready(function() {
  $('<div id="toc"></div>')
    .append('<span></span>')
    .prependTo('#thetoc'); 

  $('#casestudy h3, #casestudy h2').each(function(index) {
    var $chapterTitle = $(this);
    var chapterId = 'section-' + (index + 1);
    $chapterTitle.attr('id', chapterId);
    $('<a></a>').text($chapterTitle.text())
      .attr({
        'title': 'Jump to ' + $chapterTitle.text(),
        'href': '#' + chapterId
      })
      .appendTo('#toc span');
  });
  
});