Код:
<div id="login">
<form action="gamers/process.php" method="POST">
<div id="login_content">
....
...
...
<input type="image" src="login_button.gif" title="Вход" />
<input type="hidden" name="sublogin" value="1">
<input type="image" src="register.jpg" onclick="window.location='gamers/register.php'" title="Регистрация" />
</div>
</form>
</div>