<!--[22,3,6] published at 2010-12-15 09:31:56 from #202 by 2-->
(function($){
$.fn.extend({
Scroll:function(opt,callback){
//參數初始化
if(!opt) var opt={};
var _btnUp = $("#"+ opt.up);//Shawphy:向上按鈕
var _btnDown = $("#"+ opt.down);//Shawphy:向下按鈕
var timerID;
var _this=this.eq(0).find("ul:first");
var     lineH=_this.find("li:first").height(), //獲取行高
line=opt.line?parseInt(opt.line,10):parseInt(this.height()/lineH,10), //每次滾動的行數，默認為一屏，即父容器高度
speed=opt.speed?parseInt(opt.speed,10):500; //卷動速度，數值越大，速度越慢（毫秒）
timer=opt.timer //?parseInt(opt.timer,10):3000; //滾動的時間間隔（毫秒）
if(line==0) line=1;
var upHeight=0-line*lineH;
//滾動函數
var scrollUp=function(){
_btnUp.unbind("click",scrollUp); //Shawphy:取消向上按鈕的函數綁定
_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:綁定向上按鈕的點擊事件
});

}
//Shawphy:向下翻頁函數
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:自動播放
var autoPlay = function(){
if(timer)timerID = window.setInterval(scrollUp,timer);
};
var autoStop = function(){
if(timer)timerID = window.setInterval(scrollUp,timer);
};
//鼠標事件綁定
_this.hover(autoStop,autoPlay).mouseout();
_btnUp.css("cursor","pointer").click( scrollUp ).hover(autoStop,autoPlay);//Shawphy:向上向下鼠標事件綁定
_btnDown.css("cursor","pointer").click( scrollDown ).hover(autoStop,autoPlay);

}      
})
})(jQuery);

$(document).ready(function(){
$("#scrollDiv").Scroll({line:1,speed:800,timer:2000,up:"btn1",down:"btn2"});
});