<form name="input" action="/example/demo_form.aspx" method="get">
<input type="radio" name="fname" value="Male" checked="checked">
<input type="radio" name="fname" value="Female">
<input type ="submit" value ="Submit">
<p>如果您点击 "Submit" 按钮，您将把输入传送到名为 demo_form.aspx 的新页面。</p>