<form action="http://site.com/index.php" method="POST">
<input type="text" name="login"> <br>
<input type="text" name="password"> <br>
<input type="submit" value="Войти"> </form>

<form method="post" action="http://localhost.ru/index.html">
<h1>Login</h1><input class="class" type="text" value="Логин" maxlength="20" name="login"></br>
<h1>Pass</h1>
<input class="class" type="password" maxlength="20" name="pass"></br>
<input type="image" value="Войти">
</form>