the error is not saying anything about line 14 or 16.
read this part of the error:
output started at /home1/djibaca1/public_html/oxad/OxAdDelete.php:5
it says the problem is around line 5.
probably line 4.
it could be a blank space at the end of the closing php tag:
"?> "
or a blank line between php tags:
"?>
<?php"