$('nav > a').on( 'click', function(e){
  $('a.active').removeClass('active');
  $(this).addClass('active');
});

$('a[href*=#]:not([href=#])').click(function() {
    if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') || location.hostname == this.hostname) {
        var target = $(this.hash);
        target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
        if (target.length) {
            $('html,body').animate({
                scrollTop: target.offset().top
            }, 700);
            return false;
        }
    }
});