jQuery.fn.infiniteCarousel = function () {

    function repeat(str, num) {
        return new Array( num + 1 ).join( str );
    }
  
    return this.each(function () {
        var jQuerywrapper = jQuery('> div', this).css('overflow', 'hidden'),
            jQueryslider = jQuerywrapper.find('> ul'),
            jQueryitems = jQueryslider.find('> li'),
            jQuerysingle = jQueryitems.filter(':first'),
            
            singleWidth = jQuerysingle.outerWidth(), 
            visible = Math.ceil(jQuerywrapper.innerWidth() / singleWidth), // note: doesn't include padding or border
            currentPage = 1,
            pages = Math.ceil(jQueryitems.length / visible);            


        // 1. Pad so that 'visible' number will always be seen, otherwise create empty items
        if ((jQueryitems.length % visible) != 0) {
            jQueryslider.append(repeat('<li class="empty" />', visible - (jQueryitems.length % visible)));
            jQueryitems = jQueryslider.find('> li');
        }

        // 2. Top and tail the list with 'visible' number of items, top has the last section, and tail has the first
        jQueryitems.filter(':first').before(jQueryitems.slice(- visible).clone().addClass('cloned'));
        jQueryitems.filter(':last').after(jQueryitems.slice(0, visible).clone().addClass('cloned'));
        jQueryitems = jQueryslider.find('> li'); // reselect
        
        // 3. Set the left position to the first 'real' item
        jQuerywrapper.scrollLeft(singleWidth * visible);
        
        // 4. paging function
        function gotoPage(page) {
            var dir = page < currentPage ? -1 : 1,
                n = Math.abs(currentPage - page),
                left = singleWidth * dir * visible * n;
            
            jQuerywrapper.filter(':not(:animated)').animate({
                scrollLeft : '+=' + left
            }, 500, function () {
                if (page == 0) {
                    jQuerywrapper.scrollLeft(singleWidth * visible * pages);
                    page = pages;
                } else if (page > pages) {
                    jQuerywrapper.scrollLeft(singleWidth * visible);
                    // reset back to start position
                    page = 1;
                } 

                currentPage = page;
            });                
            
            return false;
        }
        
        if(pages > 1){
           jQuerywrapper.after('<a class="arrow back"></a><a class="arrow forward"></a>');
        }
        
        // 5. Bind to the forward and back buttons
        jQuery('a.back', this).click(function () {
            return gotoPage(currentPage - 1);             
        });
        
        jQuery('a.forward', this).click(function () {
            return gotoPage(currentPage + 1);
        });
        
        
  // Erweiterung PROSALDO  Start
  
  var counter = currentPage;
  
  $('.forward').click(function(){
     currentPage = currentPage + 1;
     if(currentPage == 5){
        currentPage = 1;
     }
     
     $('div.artbox').removeClass('active');
     
     $('div.artbox').eq(currentPage-1).addClass('active');      
  });
  
  
  $('.back').click(function(){
     currentPage = currentPage - 1;
     if(currentPage == 0){
        currentPage = 4;
     }
     
     $('div.artbox').removeClass('active');
     
     $('div.artbox').eq(currentPage-1).addClass('active');      
  });
 
       
  jQuery('div.artbox').eq(0).click(function(){
     counter = 1;
     jQuery('div.artbox').removeClass('active');
     gotoPage(counter);  
     jQuery('div.artbox').eq(counter-1).addClass('active');
     
  });
  
  jQuery('div.artbox').eq(1).click(function(){
     counter = 2;
     jQuery('div.artbox').removeClass('active');
     gotoPage(counter);   
     jQuery('div.artbox').eq(counter-1).addClass('active');
     
  });
  
  jQuery('div.artbox').eq(2).click(function(){
     counter = 3;
     jQuery('div.artbox').removeClass('active');
     gotoPage(counter);  
     jQuery('div.artbox').eq(counter-1).addClass('active');
     
  });
  
  jQuery('div.artbox').eq(3).click(function(){
     counter = 4;
     jQuery('div.artbox').removeClass('active');
     gotoPage(counter);
     jQuery('div.artbox').eq(counter-1).addClass('active');
     
  });
  // Erweiterung PROSALDO  Ende       
        
        
        
        // create a public interface to move to a specific page
        jQuery(this).bind('goto', function (event, page) {
            gotoPage(page);
        });
    });  
};