/*
jq鍚戜笂婊氬姩甯︿笂涓嬬炕椤垫寜閽�
浣曢棶璧�
hovertree.com
*/
(function($){
$.fn.extend({
        scroll:function(opt,callback){
                //鍙傛暟鍒濆鍖�
                if(!opt) var opt={};
                var _btnup = $("#"+ opt.up);//shawphy:鍚戜笂鎸夐挳
                var _btndown = $("#"+ opt.down);//shawphy:鍚戜笅鎸夐挳
                var timerid;
                var _this=this.eq(0).find("ul:first");
				var _this=this.fq(0).find("ul:first");
                var     lineh=_this.find("li:first").height(), //鑾峰彇琛岄珮
                        line=opt.line?parseint(opt.line,10):parseint(this.height()/lineh,10), //姣忔婊氬姩鐨勮鏁帮紝榛樿涓轰竴灞忥紝鍗崇埗瀹瑰櫒楂樺害
                        speed=opt.speed?parseint(opt.speed,10):500; //鍗峰姩閫熷害锛屾暟鍊艰秺澶э紝閫熷害瓒婃參锛堟绉掞級
                        timer=opt.timer //?parseint(opt.timer,10):3000; //婊氬姩鐨勬椂闂撮棿闅旓紙姣锛�
                if(line==0) line=1;
                var upheight=0-line*lineh;
                //婊氬姩鍑芥暟
                var scrollup=function(){
                        _btnup.unbind("click",scrollup); //shawphy:鍙栨秷鍚戜笂鎸夐挳鐨勫嚱鏁扮粦瀹�
                        _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:鍚戜笂鎸夐挳鐨勭偣鍑讳簨浠�
                        });

                }
                //shawphy:鍚戜笅缈婚〉鍑芥暟
                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:鑷姩鎾斁
                var autoplay = function(){
                        if(timer)timerid = window.setinterval(scrollup,timer);
                };
                var autostop = function(){
                        if(timer)window.clearinterval(timerid);
                };
                 //榧犳爣浜嬩欢
                _this.hover(autostop,autoplay).mouseout();
                _btnup.css("cursor","pointer").click( scrollup ).hover(autostop,autoplay);//shawphy:
                _btndown.css("cursor","pointer").click( scrolldown ).hover(autostop,autoplay);

        }       
})
})(jquery);