Change what claim listing button does

I have just amended the PHP for the claim listing button so instead of telling people the email address they are registered with isnt matched, it just loads the contact owner form and they can request to claim the listing.
I did this using this line:

<a href="#contactForm" <?php if ( $userdata->ID ){ echo 'onclick="document.ClaimListing.submit();"'; }else{ ?>onclick="alert('<?php echo $PPT->_e(array('ajax','1')); ?>');"<?php } ?> class="button green showform" rel="nofollow"><?php echo $PPT->_e(array('membership','8')); ?></a>

Problem is that if the user is not logged in, they get the message to say they need to be logged in and THEN the form loads afterwards, how can I get it so that if they are logged in they get the message and then no form.