$(function() {
  $('#slider').nivoSlider({
    directionNav: false,

    //effect: 'boxRain,boxRainReverse,boxRainGrow,boxRainGrowReverse,sliceDown,sliceDownLeft,sliceUp,sliceUpLeft,sliceUpDown,sliceUpDownLeft,fold',

    effect: 'random',

    slices: 10,
    boxCols: 6,
    boxRows: 3,
    animSpeed: 500,
    pauseTime: 5000,

    startSlide: window.cookie.read('nivoSlider') ? window.cookie.read('nivoSlider') : 0, // z ciastek

    beforeChange: function(){
      // zapisuje obecny slajd w ciastkach
      var vars = $('#slider').data('nivo:vars');
      var current = vars.currentSlide + 1;
      if(current > vars.totalSlides - 1) {
        current = 0;
      }
      window.cookie.create('nivoSlider',current);
    }

  });
});