(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("ul:first");
	var     lineH=_this.find("li: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）
	if(line==0) line=1;
	var upHeight=0-line*lineH;
	//滚动函数
	var scrollUp=function(){
	_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("li:first").appendTo(_this);
	}
	_this.css({marginTop:0});
	_btnUp.bind("click",scrollUp); //Shawphy:绑定向上按钮的点击事件
	});
	 
	}
	//Shawphy:向下翻页函数
	var scrollDown=function(){
	_btnDown.unbind("click",scrollDown);
	for(i=1;i<=line;i++){
	_this.find("li: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)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);
	 
	$(document).ready(function(){
	$("#scrollDiv").Scroll({line:1,speed:600,timer:2500,up:"btn1",down:"btn2"});
	});