/* ¼­ºê¸Þ´º ½ºÅ©·Ñ */

(function (global, $) {
  var $menu = $('.m-s'),
  $contents = $('.scroll'),
  $doc = $('html, body');
  $(function () {
    $menu.on('click', 'a', function (e) {
      var $target = $(this).parent(),
      idx = $target.index(),
      section = $contents.eq(idx),
      offsetTop = section.offset().top +5;
      $doc.stop().
      animate({
        scrollTop: offsetTop },
      500);
      return false;
    });
  });
  $(window).scroll(function () {
    var scltop = $(window).scrollTop();
    $.each($contents, function (idx, item) {
      var $target = $contents.eq(idx),
      i = $target.index(),
      targetTop = $target.offset().top;
      if (targetTop <= scltop) {
        $menu.removeClass('on');
        $menu.eq(idx).addClass('on');
      }
      if (!(200 <= scltop)) {
        $menu.removeClass('on');
      }
    });
  });

})(window, window.jQuery);