/** 

speed：图片轮播速度 
num：图片数量 
timer：自动轮播的时间间隔，定时器； 
flowSpeed：是滑块移动的速速度 

* @author huajianhuakai */
(function ($) {
    $.fn.blockSlide = function (settings) {
        settings = jQuery.extend({
            speed: "normal",
            num: 5,
            timer: 1000,
            flowSpeed: 300
        }, settings);
        return this.each(function () {
            $.fn.blockSlide.scllor($(this), settings);
        });
    };
    $.fn.blockSlide.scllor = function ($this, settings) {
        var index = 0;
        var imgScllor = $("div:eq(0)>div", $this);
        var timerID;
        //自动播放 
        var MyTime = setInterval(function () {
            ShowjQueryFlash(index);
            index++;
            if (index == settings.num)
                index = 0;
        }, settings.timer);
        var ShowjQueryFlash = function (i) {
            $(imgScllor).eq(i).animate({ opacity: 1 }, settings.speed).css({ "z-index": "100" }).siblings().animate({ opacity: 0 }, settings.speed).css({ "z-index": "0" });
        }
    }
})(jQuery);