小旋风SEO教程 TIY
编辑您的代码：
<html><body><form id="form1"><input type="button" value="Click me!" id="button1" /></form><p>The id of the form containing the button is: <script type="text/javascript"> x=document.getElementById('button1'); document.write(x.form.id); </script></p></body></html>
查看结果: