<script type="text/javascript">
document.forms["myForm"].submit();
<form name="myForm" 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="button" onclick="formSubmit()" value="Send form data!" />
<p>请单击确认按钮,输入会发送到服务器上名为 "demo_form.aspx" 的页面。</p>