<?php echo(ValidatedField("inserttest_365","f_name")) ?>
and
<?php echo((isset($_GET["invalid"])?ValidatedField("usersinsert","UserFirstName"):"" )); ?>
there are lots of diferances, page name, field name etc..
to convert:
<?php echo(ValidatedField("inserttest_365","f_name")) ?>
would be:
<?php echo((isset($_GET["invalid"])?ValidatedField("inserttest_365","f_name"):"" )); ?>