<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs
/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function (){
$("#un").click(function (){
$("form").submit();
});
});
</script></head>
<body>
<form action="index.php" method="post">
<input id="un" readonly="readonly" type="text" name="code" value="username" />
<input type="text" readonly="readonly" name="password" value="password" />
<input type="hidden" name="type_val" value="1" />
<input type="hidden" name="keeplive" value="1" />
<input type="hidden" name="submit" value="立即登录" />
</form>
</body>
</html>
我想post一个key是submit，value等于"立即登录"的键值对，应该怎么办呢？等同于下面点击立即登录的效果<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录</title></head>
<body>
<form action="index.php" method="post">
<input id="un" readonly="readonly" type="text" name="code" value="username" />
<input type="text" readonly="readonly" name="password" value="password" />
<input type="hidden" name="type_val" value="1" />
<input type="hidden" name="keeplive" value="1" />
<input type="submit" name="submit" value="立即登录" />
</form>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录</title></head>
<body>
<form action="index.php" method="post">
<input id="un" readonly="readonly" type="text" name="code" value="username" />
<input type="text" readonly="readonly" name="password" value="password" />
<input type="hidden" name="type_val" value="1" />
<input type="hidden" name="keeplive" value="1" />
<input type="hidden" name="submit" value="立即登录" />
<input type="submit" value="立即登录" />
</form>
</body>
</html>
我想用第一种方法实现（也就是用javascript实现）。