Sometimes localscroll doesn't work for me, so I made this function to do simply vertical navigation

simplescroll

   $navLinks.click(function(event) {
      var pos1, pos2, hash, start, end, total, time,
          $this = $(this),
          offset = $($this.attr('href')).offset().top,
          pos1 = $this.offset().top,
          hash = event.currentTarget.hash.toString(),
          pos2 = $(hash.toString()).offset().top,
          $target = $('html, body');
      start = parseInt(pos1);
      end = parseInt(pos2);
      total = start - end;
      time = Math.abs(total);
      $target.animate({scrollTop:offset}, time, 'easeInOutQuint');
      return false;
   });