/*
 * Dynamic Table of Contents script
 * by Matt Whitlock <http://www.whitsoftdev.com/>
 */

function createLink(href, innerHTML) {
  var a = document.createElement("a");
  a.setAttribute("href", href);
  a.innerHTML = innerHTML;
  return a;
}

function generateTOC(toc) {
  var i2 = 0, i3 = 0, i4 = 0;
  toc = toc.appendChild(document.createElement("ul"));
  for (var i = 0; i < $('content_for_layout').childNodes.length; ++i) {
    var node = $('content_for_layout').childNodes[i];
    var tagName = node.nodeName.toLowerCase();
    if (tagName == "h4") {
      ++i4;
      if (i4 == 1) toc.lastChild.lastChild.lastChild.appendChild(document.createElement("ul"));
      var section = i2 + "." + i3 + "." + i4;
      node.insertBefore(document.createTextNode(section + ". "), node.firstChild);
      node.id = "section" + section;
      toc.lastChild.lastChild.lastChild.lastChild.appendChild(document.createElement("li")).appendChild(createLink("#section" + section, node.innerHTML));
    } else if (tagName == "h3") {
      ++i3, i4 = 0;
      if (i3 == 1) toc.lastChild.appendChild(document.createElement("ul"));
      var section = i2 + "." + i3;
      node.insertBefore(document.createTextNode(section + ". "), node.firstChild);
      node.id = "section" + section;
      toc.lastChild.lastChild.appendChild(document.createElement("li")).appendChild(createLink("#section" + section, node.innerHTML));
    } else if (tagName == "h2") {
      ++i2, i3 = 0, i4 = 0;
      var section = i2;
      node.insertBefore(document.createTextNode(section + ". "), node.firstChild);
      node.id = "section" + section;
      toc.appendChild(h2item = document.createElement("li")).appendChild(createLink("#section" + section, node.innerHTML));
    }
  }
}