(function() {
	var $backtotoptxt = "返回顶部", $backtotopele = $('<div class="backtotop"></div>').appendto($("body"))
		.text($backtotoptxt).attr("title", $backtotoptxt).click(function() {
			$("html, body").animate({ scrolltop: 0 }, 120);
	}), $backtotopfun = function() {
		var st = $(document).scrolltop(), winh = $(window).height();
		(st > 0)? $backtotopele.show(): $backtotopele.hide();
		//ie6下的定位
		if (!window.xmlhttprequest) {
			$backtotopele.css("top", st + winh - 166);
		}
	};
	$(window).bind("scroll", $backtotopfun);
	$(function() { $backtotopfun(); });
})();

(function () {
    $.fn.infinitecarousel = function () {
        function repeat(str, n) {
            return new array( n + 1 ).join(str);
        }
        
        return this.each(function () {
            // magic!
            var $wrapper = $('> div', this).css('overflow', 'hidden'),
                $slider = $wrapper.find('> ul').width(9999),
                $items = $slider.find('> li'),
                $single = $items.filter(':first')
                
                singlewidth = $single.outerwidth(),
                visible = math.ceil($wrapper.innerwidth() / singlewidth),
                currentpage = 1,
                pages = math.ceil($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. insert the back and forward link
            $wrapper.after('<a href="#" class="arrow back">&lt;</a><a href="#" class="arrow forward">&gt;</a>');
            
            // 6. bind the back and forward links
            $('a.back', this).click(function () {
                gotopage(currentpage - 1);
                return false;
            });
            
            $('a.forward', 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);

$(document).ready(function () {
    // this is new code for the automatic infinite carousel
    var autoscrolling = true;
    if($('#imgscroll > li').length>0)
    {
        $('.infinitecarousel').infinitecarousel().mouseover(function () {
            autoscrolling = false;
        }).mouseout(function () {
            autoscrolling = true;
        });
        setinterval(function () {
            if (autoscrolling) {
                $('.infinitecarousel').trigger('next');
            }
        }, 5000);

    }
    
});