(function($){
    $.fn.Slide=function(options){
        var opts = $.extend({},$.fn.Slide.deflunt,options);
        var index=1;
        var targetLi = $("." + opts.claNav + " li", $(this));//目标对象
        var clickNext = $("." + opts.claNav + " .next", $(this));//点击下一个按钮
        var clickPrev = $("." + opts.claNav + " .prev", $(this));//点击上一个按钮
        var ContentBox = $("." + opts.claCon , $(this));//滚动的对象
        var ContentBoxNum=ContentBox.children().size();//滚动对象的子元素个数
        var slideH=ContentBox.children().first().height();//滚动对象的子元素个数高度，相当于滚动的高度
        var slideW=ContentBox.children().first().width();//滚动对象的子元素宽度，相当于滚动的宽度
        var autoPlay;
        var slideWH;
        if(opts.effect=="scroolY"||opts.effect=="scroolTxt"){
            slideWH=slideH;
        }else if(opts.effect=="scroolX"||opts.effect=="scroolLoop"){
            ContentBox.css("width",ContentBoxNum*slideW);
            slideWH=slideW;
        }else if(opts.effect=="fade"){
            ContentBox.children().first().css("z-index","1");
        }
        
        return this.each(function() {
            var $this=$(this);
            //滚动函数
            var doPlay=function(){
                $.fn.Slide.effect[opts.effect](ContentBox, targetLi, index, slideWH, opts);
                index++;
                if (index*opts.steps >= ContentBoxNum) {
                    index = 0;
                }
            };
            clickNext.click(function(event){
                $.fn.Slide.effectLoop.scroolLeft(ContentBox, targetLi, index, slideWH, opts,function(){
                    for(var i=0;i<opts.steps;i++){
                        ContentBox.find("li:first",$this).appendTo(ContentBox);
                    }
                    ContentBox.css({"left":"0"});
                });
                event.preventDefault();
            });
            clickPrev.click(function(event){
                for(var i=0;i<opts.steps;i++){
                    ContentBox.find("li:last").prependTo(ContentBox);
                }
                ContentBox.css({"left":-index*opts.steps*slideW});
                $.fn.Slide.effectLoop.scroolRight(ContentBox, targetLi, index, slideWH, opts);
                event.preventDefault();
            });
            //自动播放
            if (opts.autoPlay) {
                autoPlay = setInterval(doPlay, opts.timer);
                ContentBox.hover(function(){
                    if(autoPlay){
                        clearInterval(autoPlay);
                    }
                },function(){
                    if(autoPlay){
                        clearInterval(autoPlay);
                    }
                    autoPlay=setInterval(doPlay, opts.timer);
                });
            }
            
            //目标事件
            targetLi.hover(function(){
                if(autoPlay){
                    clearInterval(autoPlay);
                }
                index=targetLi.index(this);
                window.setTimeout(function(){$.fn.Slide.effect[opts.effect](ContentBox, targetLi, index, slideWH, opts);},200);
                
            },function(){
                if(autoPlay){
                    clearInterval(autoPlay);
                }
                autoPlay = setInterval(doPlay, opts.timer);
            });
        });
    };
    $.fn.Slide.deflunt={
        effect : "scroolY",
        autoPlay:true,
        speed : "normal",
        timer : 1000,
        defIndex : 0,
        claNav:"JQ-slide-nav",
        claCon:"JQ-slide-content",
        steps:1
    };
    $.fn.Slide.effectLoop={
        scroolLeft:function(contentObj,navObj,i,slideW,opts,callback){
            contentObj.animate({"left":-i*opts.steps*slideW},opts.speed,callback);
            if (navObj) {
                navObj.eq(i).addClass("on").siblings().removeClass("on");
            }
        },
        
        scroolRight:function(contentObj,navObj,i,slideW,opts,callback){
            contentObj.stop().animate({"left":0},opts.speed,callback);
            
        }
    }
    $.fn.Slide.effect={
        fade:function(contentObj,navObj,i,slideW,opts){
            contentObj.children().eq(i).stop().animate({opacity:1},opts.speed).css({"z-index": "1"}).siblings().animate({opacity: 0},opts.speed).css({"z-index":"0"});
            navObj.eq(i).addClass("on").siblings().removeClass("on");
        },
        scroolTxt:function(contentObj,undefined,i,slideH,opts){
            //alert(i*opts.steps*slideH);
            contentObj.animate({"margin-top":-opts.steps*slideH},opts.speed,function(){
                for( var j=0;j<opts.steps;j++){
                    contentObj.find("li:first").appendTo(contentObj);
                }
                contentObj.css({"margin-top":"0"});
            });
        },
        scroolX:function(contentObj,navObj,i,slideW,opts,callback){
            contentObj.stop().animate({"left":-i*opts.steps*slideW},opts.speed,callback);
            if (navObj) {
                navObj.eq(i).addClass("on").siblings().removeClass("on");
            }
        },
        scroolY:function(contentObj,navObj,i,slideH,opts){
            contentObj.stop().animate({"top":-i*opts.steps*slideH},opts.speed);
            if (navObj) {
                navObj.eq(i).addClass("on").siblings().removeClass("on");
            }
        }
    };
})(jQuery);