.register:not([rel]) .register-message {display: none;}
.register:not([rel]) .register-form {display: none;}

.register[rel="fill"] .register-message {}
.register[rel="fill"] .register-form {}

.register[rel="wait"] .register-message {}
.register[rel="wait"] .register-form {display: none;}

.register[rel="done"] .register-message {}
.register[rel="done"] .register-form {display: none;}