var $j = jQuery.noConflict();
$j.fn.infiniteCarousel = function () {

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


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

        // 2. Top and tail the list with 'visible' number of items, top has the last section, and tail has the first
        //$jitems.filter(':first').before($jitems.slice(- visible).clone().addClass('cloned'));
        //$jitems.filter(':last').after($jitems.slice(0, visible).clone().addClass('cloned'));
       // $jitems = $jslider.find('> li'); // reselect
        
        // 3. Set the left position to the first 'real' item
        $jwrapper.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;
            
            $jwrapper.filter(':not(:animated)').animate({
                scrollLeft : '+=' + left
            }, 500, function () {
                if (page == 0) {
                    $jwrapper.scrollLeft(singleWidth * visible * pages);
                    page = pages;
                } else if (page > pages) {
                    $jwrapper.scrollLeft(singleWidth * visible);
                    // reset back to start position
                    page = 1;
                } 

                currentPage = page;
            });                
            
            return false;
        }
        
        $jwrapper.after('<a class="arrow back">◄</a><a class="arrow forward">►</a>');
        
        // 5. Bind to the forward and back buttons
        $j('a.back', this).click(function () {
            return gotoPage(currentPage - 1);                
        });
        
        $j('a.forward', this).click(function () {
            return gotoPage(currentPage + 1);
        });
        
        // create a public interface to move to a specific page
        $j(this).bind('goto', function (event, page) {
            gotoPage(page);
        });
    });  
};

$j(document).ready(function () {
  $j('.infiniteCarousel').infiniteCarousel();
});