//CAROUSEL PHOTOS
$.fn.autoscroll = function (interval, timerInterval) {

  var interval = interval;
  var timerInterval = timerInterval;
  var focused = false; 

  //REPEAT FUNCTION
  function repeat(str, n) {
    return new Array( n + 1 ).join( str );
  }

  return this.each(function () {
    //plugin code
    var $wrap = $('> div', this).css('overflow','hidden'),
        $slider = $wrap.find('> ul'),
        $items = $slider.find('> li'),
        $single = $items.filter(':first'),

        singleHeight = $single.outerHeight(),
        //note: doesnt include padding or border
        visible = 1,
        currentPage = 1,
        pages = Math.ceil($items.length / visible);
    //PADDING WITH EMPTY ITEMS    
    if(($items.length % visible) !=0) {
      $slider.append(repeat('<li class="empty" />', visible - ($items.length % visible)));
      $items = $slider.find('> li');
    } 
    
    // GENERATING CLONES  
    $items.filter(':first').before($items.slice(-1).clone().addClass('cloned'));
    $items.filter(':last').after($items.slice(0, 1).clone().addClass('cloned')); 
    $items = $slider.find('> li'); //reselect
    
    //RESET SCROLL LEFT
    $wrap.scrollTop(singleHeight * visible);

    function gotoPage(page) {
      var n = Math.abs(currentPage - page),
          top = singleHeight * visible * n;    
      $wrap.filter(':not(:animated)').animate({
        scrollTop : '+=' + top
      }, interval, function () {
        if(page == 0){
          $wrap.scrollTop(singleHeight * visible * pages);
          page = pages;
        } else if (page > pages){
          $wrap.scrollTop(singleHeight * visible);
          page = 1;
        }  
        currentPage = page;
      }); 
      return false;    
    }
  
    //AUTOSCROLL

    //zde zajistim aby se neposouvali obrazky, pokud jsem na nektery najel mysi
    $('.autoscroller ul li').hover(
      function () {
        focused = true;
      }, 
      function () {
        focused = false;
      }
    );

    $.timer(timerInterval, function (timer) {
        if(!focused){
          gotoPage(currentPage + 1);
          $(this).bind('goto', function (event, page) {
            gotoPage(page);
          });
        }  
    });
    
  });  
};