<form action="/example/demo_form.aspx" method="get">
First name: <input type="text" name="fname" /><br />
Last name: <input type="text" name="lname" /><br />
<input type="submit" value="提交" /><br />
<input type="submit" formaction="/example/demo_admin.aspx" value="以管理员身份提交" />