<form method="POST" action="/privmsg">
    <input type="hidden" name="username" value="Slood" />
    <input type="text" name="subject" placeholder="Votre code ami" />
    <textarea name="message" placeholder="Votre commande" cols="35" rows="3"></textarea/>
    <input type="submit" name="post" value="Valider" />
    </form>