我正在自动化信用卡支付系统，该系统进一步重定向到通过签证或万事达卡安全程序窗口验证，具体取决于我们输入的卡详细信息，并且在识别这些新的安全支付窗口上的元素时遇到了问题.....以下是DOM
form method="POST">
<input type="hidden" value="https://qa.www.viagogo.co.uk/secure/ModalRedirect.aspx?return=true&complete=true&gogoReturn=pares" name="TermUrl">
<textarea name="PaReq" style="display: none">eJxdUltugzAQ/M8pUA6AbSDkIccSLZGaD9Ko5QKWWRHU8oiBkN6+NoljkpUseWfG9np2aXqSAPE3 iF4CmzkOTaBteQ5OkW3nDXd9vMB4tQrIcq5pJThGX3C+7VV2AdkWdcWIi12PIpMaOgEpTrzqDKAg Ls5v+wML1iRcLim6p5YvQe5jRkLsB97ax7eg6AZbWcVLYMc+r7go6r51dlUG/FLLlqKRskpR91Un /9jKCykyiaV7+ctOXddsEBqGwb0UPK/z2hV1iSjSpPkLev0MPfYaaKePXYuMJXE02JUMhzQaPuMc J6nYUqQVVp/xDpiHiU8IDhzibxbhxldGjvjEtFLXzQgm2MWKvudW0OhSIqvSoik2saOXEiph/DCZ FcC1qStQZ9QVj/2kYmgF210U6KSF+IFOOT5iD59ebaHvH0/9F53qZKDCV+GpICr0JIzEUyGFapWH MRkrKWzfKDJ3qufMQOoOjcPLZhQ9D/Y/N5DJVw== </textarea>
<input type="hidden" value="4300203050088417" name="MD">
<p>To continue, press the button which corresponds to the required response.</p>
<center>
<table>
<tbody>
<tr>
<td width="40%" align="center">
<input type="submit" value="Authenticated" name="choice" size="30">
</td>