var nav_items = document.getElementById('navigation').getElementsByTagName('a');
var stripped_url = document.location.href.match(/([^\/]+)\/(#.+)?$/)[1];
for(var i = 0; i < nav_items.length; i++) {
  var slug = nav_items[i].href.match(/([^\/]+)\/$/);
    var stripped_href = (slug) ? slug[1] : '';

    if(stripped_url == stripped_href) {
      nav_items[i].parentNode.className = 'selected';
      nav_items[i].parentNode.parentNode.parentNode.className = 'selected';
      break;
    }
}