Extension for the DokuWiki Vector template to make the TOC remain visible when page scrolls. Put this file to the user directory of the Vector template and enable loading of user.js in the Configuration panel

user.js

jQuery(document).ready(function () {  
  var tocSelector = "#dw__toc";
  var top = jQuery(tocSelector).offset().top - parseFloat(jQuery(tocSelector).css('marginTop').replace(/auto/, 0));
  jQuery(window).scroll(function (event) {
    // what the y position of the scroll is
    var y = jQuery(this).scrollTop();
    var toc = jQuery(tocSelector);

    if (y >= top) {
      // if so, ad the fixed class
      toc.css("position", "fixed");
      toc.css("top", "0");
      toc.css("right", "16px");
      toc.css("opacity", 0.7);
    } else {
      // otherwise remove it
      toc.css("position", "");
      toc.css("top", "");
      toc.css("right", "");
      toc.css("opacity", 1);
    }
  });
});