JavaScript confirm确认框-在线运行代码案例-大卫编程网

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<!DOCTYPE html>
<html>
<title>JavaScript confirm确认框示例 - 基础教程(div.cn)</title>
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<body>
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<p>单击按钮以检查浏览器是否启用了Java:</p>
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<button onclick="myFunc()">点我试试</button>
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<p id="output"></p>
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<script>
function myFunc() {
  var x = navigator.javaEnabled();
  document.querySelector("#output").innerHTML = x;
}
</script>
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</body>
</html>