AI 编程工具xxxxxxxxxx<html><head><meta charset="utf-8"><title>菜鸟教程(runoob.com)</title></head><body><p>点击按钮，3 秒后会弹出 "Hello"。</p><button onclick="myFunction()">点我</button><script>function myFunction() { setTimeout(function(){ alert("Hello"); }, 3000);}</script></body></html>