选取文本域的内容 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <script>
    function myFunction() {
      document.getElementById("email").select();
    }
  </script>
</head>
<body>

  <form>
    Email: <input type="text" id="email" value="someone@example.com">
  </form>
  <button type="button" onclick="myFunction()">选取内容</button>

</body>
</html>
        