本文实例讲述了JS实现的五级联动菜单效果。分享给大家供大家参考，具体如下：
js实现多级联动的方法很多，这里给出一种5级联动的例子，其实可以扩展成N级联动,在做项目的时候碰到了这样一个问题但是有不能从数据库中动态的加载这些选项，所以只有想办法从单个的页面着手来处理了，应为项目的表单是动态产生的，所以需要每个流程的设计过程中需要有单独的页面来处理，这样就决定了不能改变已有的业务逻辑来实现多级表单的联动。
运行效果图如下：
完整代码如下：
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