// JavaScript Document
(function () {
    $.fn.slides = function () {
        function repeat(str, n) {
            return new Array( n + 1 ).join(str);
        }
        
        return this.each(function () {
            // magic!
            var $wrapper = $('> div', this),
                $slider = $wrapper.find('> ul').width(9999),
                $items = $slider.find('> li'),
                $single = $items.filter(':first')
                
                singleWidth = $single.outerWidth(),
                visible = Math.round($wrapper.innerWidth() / singleWidth),
                currentPage = 1,
                pages = Math.round($items.length / visible);
                
            /* TASKS */
            
            // 1. pad the pages with empty element if required
            if ($items.length % visible != 0) {
                // pad
                $slider.append(repeat('<li class="empty" />', visible - ($items.length % visible)));
                $items = $slider.find('> li');
            }
            
            // 2. create the carousel padding on left and right (cloned)
            $items.filter(':first').before($items.slice(-visible).clone().addClass('cloned'));
            $items.filter(':last').after($items.slice(0, visible).clone().addClass('cloned'));
            $items = $slider.find('> li');
            
            // 3. reset scroll
            $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 == last page - then reset position
                    if (page > pages) {
                        $wrapper.scrollLeft(singleWidth * visible);
                        page = 1;
                    } else if (page == 0) {
                        page = pages;
                        $wrapper.scrollLeft(singleWidth * visible * pages);
                    }
                    
                    currentPage = page;
                });
            }
            
            // 5. bind the back and forward links
            $('span.prev', this).click(function () {
                gotoPage(currentPage - 1);
                return false;
            });
            
            $('span.next', this).click(function () {
                gotoPage(currentPage + 1);
                return false;
            });
            
            $(this).bind('goto', function (event, page) {
                gotoPage(page);
            });
            
            // THIS IS NEW CODE FOR THE AUTOMATIC INFINITE CAROUSEL
            $(this).bind('next', function () {
                gotoPage(currentPage + 1);
            });
        });
    };
})(jQuery);

//向下滚动
(function () {
    $.fn.scrolldown = function () {
		var scrtime;
		// magic!
		var $scroll = $(this);
		$items = $scroll.find('> li'),
		$single = $items.filter(':first')
		// get item height
		var _height = $single.outerHeight();

		$scroll.hover(function(){
			clearInterval(scrtime);
		},function(){
		scrtime = setInterval(function(){
			  $scroll.animate(1200,function(){
				$scroll.find("li:last").prependTo($scroll)
				$scroll.find("li:first").hide();
				$scroll.css({marginTop:0});
				$scroll.find("li:first").fadeIn(1200);
			  }); 
			},4000);
		
		}).trigger("mouseleave");
   };
})(jQuery);