html运行实例（eg_js_prompt）-搜寻教程库

代码示例：（标识：eg_js_prompt）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Prompt</h1>

<button onclick="myFunction()">试一试</button>

<p id="demo"></p>

<script>
function myFunction() {
  var txt;
  var person = prompt("请输入您的名字：", "哈利波特");
  if (person == null || person == "") {
    txt = "用户取消输入";
  } else {
    txt = "你好，" + person + "！今天过得好吗？";
  }
  document.getElementById("demo").innerHTML = txt;
}
</script>

</body>
</html>