$.fn.infiniteCarousel = function () {

    function repeat(str, num) {
        return new Array( num + 1 ).join( str );
    }

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

            singleWidth = 1003,
            visible = 1, // note: doesn't include padding or border
            currentPage = 1,
            pages = Math.ceil($items.length / visible);


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

        // 2. Top and tail the list with 'visible' number of items, top has the last section, and tail has the first
        $items.filter(':first').before($items.slice(- visible).clone().addClass('cloned'));
        $items.filter(':last').after($items.slice(0, visible).clone().addClass('cloned'));
        $items = $slider.find('> li'); // reselect

        // 3. Set the left position to the first 'real' item
        $wrapper.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;

            $wrapper.filter(':not(:animated)').animate({
                scrollLeft : '+=' + left
            }, 500, function () {
                if (page == 0) {
                    $wrapper.scrollLeft(singleWidth * visible * pages);
                    page = pages;
                } else if (page > pages) {
                    $wrapper.scrollLeft(singleWidth * visible);
                    // reset back to start position
                    page = 1;
                }

                currentPage = page;
            });

            return false;
        }
        $.fn.gotoPage = function (obj, page) {
               var dir = page < currentPage ? -1 : 1,
                n = Math.abs(currentPage - page),
                left = singleWidth * dir * visible * n;

            $wrapper.filter(':not(:animated)').animate({
                scrollLeft : '+=' + left
            }, 500, function () {
                if (page == 0) {
                    $wrapper.scrollLeft(singleWidth * visible * pages);
                    page = pages;
                } else if (page > pages) {
                    $wrapper.scrollLeft(singleWidth * visible);
                    // reset back to start position
                    page = 1;
                }
                $('.herolink').removeClass('active');
               $(obj).addClass('active');
                currentPage = page;
             
            });
        }

        $wrapper.after('<a class="arrow back">&lt;</a><a class="arrow forward">&gt;</a>');

        // 5. Bind to the forward and back buttons
        $('a.arrow', this).click(function () {
           $('.herolink').removeClass('active');
          
           
        });
        $('a.back', this).click(function () {
            var dot = 0;
            if(currentPage == 1){dot = 2 }else{
                dot = currentPage - 2;
            }
           $("#dots").find("a:eq("+(dot)+")").addClass('active');
            return gotoPage(currentPage - 1);
        });

        $('a.forward', this).click(function () {
            var dot = 0;
            if(currentPage == 3){dot = 0 }else{
                dot = currentPage;
            }
            $("#dots").find("a:eq("+(dot)+")").addClass('active');
            return gotoPage(currentPage + 1);
        });

        // create a public interface to move to a specific page
        $(this).bind('goto', function (event, page) {
            gotoPage(page);
        });
    });
};