Apuarv,
What file are you looking at? There are no conditionals in the /components/com_jlinked/views/loginregister/default.php file, they're all done 'above' that in code. We simply add the correct style in that file. Please also check that you haven't created a template override in the /templates/<YOUR_TEMPLATE>/html/com_jlinked/loginregister directory. If you have, you'll need to integrate the changes from the new file into your overridden one (or simply remove it).
Thanks,
Alex