var previous = 0;
var inntimer = '';
(function ($) {

  $.fn.innerfade = function (options) {
    return this.each(function () {
      $.innerfade(this, options);
    });
  };

  $.innerfade = function (container, options) {
    var settings = {
      'animationtype': 'fade',
      'speed': 'normal',
      'originalspeed': 'normal',
      'type': 'sequence',
      'timeout': 2000,
      'containerheight': 'auto',
      'runningclass': 'innerfade',
      'children': null,
      'play': 'yes'
    };

    if (options)
      $.extend(settings, options);
    if (settings.children === null)
      var elements = $(container).children();
    else
      var elements = $(container).children(settings.children);

    if (elements.length > 1) {

      $(container).css('position', 'relative').css('height', settings.containerheight).addClass(settings.runningclass);
      for (var i = 0; i < elements.length; i++) {
        $(elements[i]).css('z-index', String(elements.length - i)).css('position', 'absolute').hide();
        /* SSA 16-nov-2009: mousehover zorgt voor een ganaar event, click volgt 'gewoon' de link.*/
        $('#link_' + i + ' a').mouseenter(function () {
          settings.play = 'yes';
          // Snelheid verhogen, anders duurt de overgang zo lang
          settings.originalspeed = settings.speed;
          settings.speed = 250;
          $.innerfade.ganaar(elements, settings, $(this).parent().get(0));
          // Zo lang de muis 'in' de a-tag is, niet verdergaan.
          settings.play = 'no';
        });
        $('#link_' + i + ' a').mouseleave(function () {
          settings.play = 'yes';
          settings.speed = settings.originalspeed;
        });

      };
      $('#link_0').addClass("active");
      if (settings.type == "sequence") {
        inntimer = setTimeout(function () {
          $.innerfade.next(elements, settings, 1, 0);
        }, settings.timeout);
        $(elements[0]).show();
      } else if (settings.type == "random") {
        var last = Math.floor(Math.random() * (elements.length));
        inntimer = setTimeout(function () {
          do {
            current = Math.floor(Math.random() * (elements.length));
          } while (last == current);
          $.innerfade.next(elements, settings, current, last);
        }, settings.timeout);
        $(elements[last]).show();
      } else if (settings.type == 'random_start') {
        settings.type = 'sequence';
        var current = Math.floor(Math.random() * (elements.length));
        inntimer = setTimeout(function () {
          $.innerfade.next(elements, settings, (current + 1) % elements.length, current);
        }, settings.timeout);
        $(elements[current]).show();
      } else {
        alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
      }
    }
  };

  $.innerfade.ganaar = function (elements, settings, el) {

    i = parseInt(el.id.replace("link_", ""));
    current = i;
    last = previous;
    if (current != last) {
      clearTimeout(inntimer);
      $.innerfade.next(elements, settings, current, last, true);
    }
  }

  $.innerfade.next = function (elements, settings, current, last, faster) {
    if (settings.play == 'yes') {
      //  alert(current);
      for (var i = 0; i < elements.length; i++) {

        $('#link_' + i).removeClass("active");
      }
      $('#link_' + current).addClass("active");

      // SSA 20-okt-2009: Stop roulatie functionaliteit toegevoegd volgens NHL Todo 034.
      if ($('#link_' + current).hasClass('stop_roulatie')) {
        settings.play = 'no';
      }

      if (settings.animationtype == 'slide') {
        $(elements[last]).slideUp(settings.speed);
        $(elements[current]).slideDown(settings.speed);
      } else if (settings.animationtype == 'fade') {
        $(elements[last]).fadeOut(settings.speed);
        $(elements[current]).fadeIn(settings.speed, function () {
          removeFilter($(this)[0]);
        });
      } else
        alert('Innerfade-animationtype must either be \'slide\' or \'fade\'');
      if (settings.type == "sequence") {
        if ((current + 1) < elements.length) {
          current = current + 1;
          last = current - 1;
        } else {
          current = 0;
          last = elements.length - 1;
        }
      } else if (settings.type == "random") {
        last = current;
        while (current == last)
          current = Math.floor(Math.random() * elements.length);
      } else
        alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
      previous = last;
      inntimer = setTimeout((function () {
        $.innerfade.next(elements, settings, current, last);
      }), settings.timeout);
    }
  };

})(jQuery);

// **** remove Opacity-Filter in ie ****
function removeFilter(element) {
  try {
    if (element.style.removeAttribute) {
      element.style.removeAttribute('filter');
    }
  } catch (e) { }
}