What I've got so far is to create a shortcut like this
if myfunction then
RETURN '<body style="background-color:khaki">';
else
RETURN null;
end if;
and use that shortcut in the HTML Header of the page, but I would like to convert that in a rule for *all* pages of all my applications. How can I do that?
Thanks.
By the way: is there a how-to FAQ somewhere? I have been unable to find it.