当submit按钮点击提交表单后显示一个弹窗框 - 在线编辑器

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <script>
    function greeting() {
      alert("Welcome " + document.forms["frm1"]["fname"].value + "!")
    }
  </script>
</head>
<body>

  你的名字是：<br>
  <form name="frm1" action="tryjs-ref_form_onsubmit.htm" onsubmit="greeting()">
    <input type="text" name="fname">
    <input type="submit" value="提交">
  </form>

</body>
</html>
​x
 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <script>
    function greeting() {
      alert("Welcome " + document.forms["frm1"]["fname"].value + "!")
    }
  </script>
</head>
<body>
​
  你的名字是：<br>
  <form name="frm1" action="tryjs-ref_form_onsubmit.htm" onsubmit="greeting()">
    <input type="text" name="fname">
    <input type="submit" value="提交">
  </form>
​
</body>
</html>