<html><body><h1>Window 对象</h1><h2>prompt() 方法</h2><p>请点击按钮来演示提示框。</p><button onclick="myFunction()">试一试</button><p id="demo"></p><script>function myFunction() { let person = prompt("请输入你的名字", "哈利·波特"); if (person != null) { document.getElementById("demo").innerHTML = "Hello " + person + "！您今天怎么样？"; }}</script></body></html>