小旋风SEO教程 TIY
编辑您的代码：
<html><body><form id="form1"><input type="password" id="password1" /></form><p>The id of the form containing the password field is: <script type="text/javascript"> x=document.getElementById('password1'); document.write(x.form.id); </script></p></body></html>
查看结果: