(function($) {

    $.fn.extend({
        ztree: function(options) {

            var $this = this;//当前对象 .ztree_main
            this.options = $.extend($.fn.ztree.defaults, options);//传入的参数转换成对象
            
            //逻辑代码
                     alert($this.html());
                     alert(this.options.slideTime);//读取参数值
          }
    });

      //默认参数值
    $.fn.ztree.defaults = {
                slideEnable:true,
         slideTime: 0
    };

})(jQuery);

$(document).ready(function() {
  $(".ztree_mian").ztree({
    slideTime: 400
  });
});