(function($) {
    $.fn.extend({
        Scroll:function(opt, callback) {
            //参数初始化 
            if (!opt) var opt = {};
            //var _btnUp = $("#" + opt.up); //Shawphy:向上按钮 
            //var _btnDown = $("#" + opt.down); //Shawphy:向下按钮 
            var timerID;
            var _this = this;//.eq(0).find("div:first");
            var lineH = _this.find("ul:first").height(); //获取行高 
			line = opt.line ? parseInt(opt.line, 10) : parseInt(this.height() / lineH, 10), //每次滚动的行数，默认为一屏，即父容器高度 
			speed = opt.speed ? parseInt(opt.speed, 10) : 500; //卷动速度，数值越大，速度越慢（毫秒） 
            timer = opt.timer; //?parseInt(opt.timer,10):3000; //滚动的时间间隔（毫秒）
			direction = opt.direction?opt.direction:"up";//滚动的方式；up为向上，down为向下

            if (line == 0) line = 1;
            var upHeight = 0 - line * lineH;
            //滚动函数 
            var scrollUp = function() {
				//alert(_this.html());
                //_btnUp.unbind("click", scrollUp); //Shawphy:取消向上按钮的函数绑定 
                /*_this.animate({
                    marginTop: upHeight
                }, speed, function() {
                    for (i = 1; i <= line; i++) {
                        _this.find("ul:first").appendTo(_this);
                    }
                    _this.css({ marginTop: 0 });
                //    _btnUp.bind("click", scrollUp); //Shawphy:绑定向上按钮的点击事件 
                });*/
				for (i = 1; i <= line; i++) {
                        _this.find("ul:first").appendTo(_this);
                    }
                    _this.css({ marginTop: 0 });
            }
           /* //Shawphy:向下翻页函数 
            var scrollDown = function() {
                //_btnDown.unbind("click", scrollDown);
                for (i = 1; i <= line; i++) {
                    _this.find("ul:last").show().prependTo(_this);
                }
                _this.css({ marginTop: upHeight });
                _this.animate({
                    marginTop: 0
                }, speed, function() {
                    //_btnDown.bind("click", scrollDown);
                });
            }*/
            //Shawphy:自动播放 
            var autoPlay = function() {
				if (timer) {
					if(direction.toLowerCase() == "down")
						timerID = window.setInterval(scrollDown, timer);
					else
						timerID = window.setInterval(scrollUp, timer);
				}

            };
            var autoStop = function() {
                if (timer) window.clearInterval(timerID);
            };
            //鼠标事件绑定 
            _this.hover(autoStop, autoPlay).mouseout();
            //_btnUp.css("cursor", "pointer").click(scrollUp).hover(autoStop, autoPlay); //Shawphy:向上向下鼠标事件绑定 
            //_btnDown.css("cursor", "pointer").click(scrollDown).hover(autoStop, autoPlay);
			
        }
    })
})(jQuery);