摘要: <body> <button>按钮1</button> <button>按钮2</button> <button>按钮3</button> <button>按钮4</button> <button>按钮5</button> </body> <script> var btns = document.g 阅读全文
posted @ 2019-12-02 10:48 竹子up 阅读(3494) 评论(0) 推荐(0)