;(function($){
    $.fn.cutover = function(){
        var $this = $(this) //items 鍏冪礌
        var items = $('.coel-edu .adv span');
        var oUl = $this.parent();
 
        var oLi = $this.each(function(){
            var btn = $this.children('i');
            btn.click(function(){
                $this.fadeOut(300);
                oUl.css('display','none');
            })
        })    
        items.click(function(){
            oUl.css('display','flex');
            index = $(this).index()-1;
            console.log(index);
            oLi.eq(index).fadeIn(400);
        }) 
    }
})(jQuery)