giving current page item in menu, or current parent page item in menu an active class

gistfile1.txt

http://blog.huidesign.com/automatically-highlight-current-page-in-navigation-with-css-jquery/

      var str=location.href.toLowerCase();
      $(".nav a").each(function() {
        if (str.indexOf(this.href.toLowerCase()) > -1) {
          $("li.current").removeClass("current");
          $(this).parent().addClass("current");
        }
      });
      $("li.current").parents().each(function(){
        if ($(this).is("li")){
          $(this).addClass("current");
        }
      });