$(document).ready(function() {
    if ($("#main-content")[0] && $("#main-content a[name]")[0]) {
        $("#left-sidebar").prepend("<div id='table-of-contest'><h2>Spis Treści</h2><ol></ol></div>");
        $('#main-content a[name]').parent("h1, h2, h3, h4, h5, h6").each(function(){
            var element = $(this);
            var anchor_name = $(this).children("a").attr('name');
            
            $("#left-sidebar #table-of-contest ol").append("<li><a href='#" + anchor_name +"'>" + element.text() + "</a>");
        });
    }
    
    if ($("#main-content")[0]) {
        $("#main-content p:first").addClass('preface');
    }

});