Create a "Table of Contents" in your Github wiki

github_wiki_toc.js

$(function () {
  var toc = $("<ul>").css("margin-bottom", "20px !important");
  $("div.main div.wikistyle h2").each(function() {
    var id = $(this).text().replace(/\s+/g, "_").replace(/[^0-9a-zA-Z_.-]/g, "")
    $(this).attr("id", id)
    toc.append(
      $("<li>").append($("<b>").append($("<a>").attr("href", "#" + id).text($(this).text())))
    )
  });
  $("div.wikistyle").prepend(toc).prepend($("<h2>").text("Table of Contents"));
})

How do I use this? Or where do I put it to make it work?

According to http://support.github.com/discussions/repos/4299-auto-generate-table-of-contents-in-wiki-pages this can no longer work.

I developed GitHub Wikifier: A pre-commit Git Hook that will generate all the Table of Contents you will ever need. Just write your content, and let it take over. May be worth a check. https://github.com/kuroir/GitHub-Wikifier

You can get auto-generated TOC by using doc type AsciiDoc and inserting :toc:.

it appears :toc: doesn't work, as per https://github.com/artificialwisdomai/origin/wiki/Home/d0a63b257f2aeeec6aaa79304d53e190b1a439c3