$.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'),
            $items = $slider.find('> li'),
            $single = $items.filter(':first'),
            
            singleWidth = $single.outerWidth(), 
            visible = Math.ceil($wrapper.innerWidth() / singleWidth), // 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
			    }, 900, 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;
	    }
        
	    $wrapper.after('<a class="arrow back" title="scroll left">&larr;</a><a class="arrow forward" title="scroll right">&rarr;</a>');
        
	    // 5. Bind to the forward and back buttons
	    $('a.back', this).click(function () {
		    return gotoPage(currentPage - 1);                
		});
        
	    $('a.forward', this).click(function () {
		    return gotoPage(currentPage + 1);
		});
        
	    // create a public interface to move to a specific page
	    $(this).bind('goto', function (event, page) {
		    gotoPage(page);
		});
	});  
};

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