// JavaScript Document

(function($){
    $.fn.textSlider = function(settings){    
        settings = jQuery.extend({
            speed : "normal",
            line : 3,
            timer : 1000
        }, settings);
        return this.each(function() {
            $.fn.textSlider.scllor( $( this ), settings );
        });
    }; 
    $.fn.textSlider.scllor = function($this, settings){
        //alert($this.html());
        var ul = $( "ul:eq(0)", $this );
        var timerID;
        var li = ul.children();
        var _btnUp=$(".up:eq(0)", $this)
        var _btnDown=$(".down:eq(0)", $this)
        var liHight=$(li[0]).height();
        var upHeight=0-settings.line*liHight;//滚动的高度；
        var scrollUp=function(){
            _btnUp.unbind("click",scrollUp);
            ul.animate({marginTop:upHeight},settings.speed,function(){
                for(i=0;i<settings.line;i++){
                     //$(li[i]).appendTo(ul);
                     ul.find("li:first").appendTo(ul);
                    // alert(ul.html());
                }
                   ul.css({marginTop:0});
                _btnUp.bind("click",scrollUp); //Shawphy:绑定向上按钮的点击事件
            });    
        };
        var scrollDown=function(){
            _btnDown.unbind("click",scrollDown);
            ul.css({marginTop:upHeight});
            for(i=0;i<settings.line;i++){
                ul.find("li:last").prependTo(ul);
            }
            ul.animate({marginTop:0},settings.speed,function(){
                _btnDown.bind("click",scrollDown); //Shawphy:绑定向上按钮的点击事件
            });    
        };
        var autoPlay=function(){
            timerID = window.setInterval(scrollUp,settings.timer);
            //alert(settings.timer);
        };
        var autoStop = function(){
            window.clearInterval(timerID);
        };
        //事件绑定
        ul.hover(autoStop,autoPlay).mouseout();
        _btnUp.css("cursor","pointer").click( scrollUp );
        _btnUp.hover(autoStop,autoPlay);
        _btnDown.css("cursor","pointer").click( scrollDown );
        _btnDown.hover(autoStop,autoPlay)
    };
})(jQuery);