alt_layout in CreateAccount.pm?

[jadelennox]

cgi-bin/LJ/Widget/CreateAccount.pm is full of references to a variable named $alt_layout. However, aside from in the accompanying CreateAccount JavaScript and i18n files, $alt_layout is never mentioned in the code. I can certainly not see where it gets passed to CreateAccount.pm in order to get taken in as an option:

my $alt_layout = $opts{alt_layout} ? 1 : 0;

What is this variable for? How does it get passed to CreateAccount? What does it mean?

Thanks very much.