Set active link

set_active_link

(function () {
  var left_links = document.getElementById("menu").getElementsByTagName('a');
  var current_url = document.location;
  for (var i = 0; i < left_links.length; i++) {
    if (current_url.pathname == left_links[i].pathname && current_url.host == left_links[i].host ) {
                left_links[i].className += ' active';
            }
        }
})();