/*
jQ閸氭垳绗傚姘З鐢缚绗傛稉瀣倳妞ゅ灚瀵滈柦锟
*/
(function($){
$.fn.extend({
        Scroll:function(opt,callback){
                //閸欏倹鏆熼崚婵嗩潗閸栵拷
                if(!opt) var opt={};
                var _btnUp = $("#"+ opt.up);//Shawphy:閸氭垳绗傞幐澶愭尦
                var _btnDown = $("#"+ opt.down);//Shawphy:閸氭垳绗呴幐澶愭尦
                var timerID;
                var _this=this.eq(0).find("ul:first");
                var     lineH=_this.find("li:first").height(), //閼惧嘲褰囩悰宀勭彯
                        line=opt.line?parseInt(opt.line,10):parseInt(this.height()/lineH,10), //濮ｅ繑顐煎姘З閻ㄥ嫯顢戦弫甯礉姒涙顓绘稉杞扮鐏炲骏绱濋崡宕囧煑鐎圭懓娅掓妯哄
                        speed=opt.speed?parseInt(opt.speed,10):500; //閸楀嘲濮╅柅鐔峰閿涘本鏆熼崐鑹扮Ш婢堆嶇礉闁喎瀹崇搾濠冨弮閿涘牊顕犵粔鎺炵礆
                        timer=opt.timer //?parseInt(opt.timer,10):3000; //濠婃艾濮╅惃鍕闂傛挳妫块梾鏃撶礄濮ｎ偆顫楅敍锟
                if(line==0) line=1;
                var upHeight=0-line*lineH;
                //濠婃艾濮╅崙鑺ユ殶
                var scrollUp=function(){
                        _btnUp.unbind("click",scrollUp); //Shawphy:閸欐牗绉烽崥鎴滅瑐閹稿鎸抽惃鍕毐閺佹壆绮︾€癸拷
                        _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:缂佹垵鐣鹃崥鎴滅瑐閹稿鎸抽惃鍕仯閸戣绨ㄦ禒锟
                        });

                }
                //Shawphy:閸氭垳绗呯紙濠氥€夐崙鑺ユ殶
                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:閼奉亜濮╅幘顓熸杹
                var autoPlay = function(){
                        if(timer)timerID = window.setInterval(scrollUp,timer);
                };
                var autoStop = function(){
                        if(timer)window.clearInterval(timerID);
                };
                 //姒х姵鐖ｆ禍瀣╂缂佹垵鐣
                _this.hover(autoStop,autoPlay).mouseout();
                _btnUp.css("cursor","pointer").click( scrollUp ).hover(autoStop,autoPlay);//Shawphy:閸氭垳绗傞崥鎴滅瑓姒х姵鐖ｆ禍瀣╂缂佹垵鐣
                _btnDown.css("cursor","pointer").click( scrollDown ).hover(autoStop,autoPlay);

        }       
})
})(jQuery);