cmc-sales/views/customers/customer_contacts.ctp

<script type="text/javascript">
    $(function() {
        $("#addContact").button(); 
    });
</script>

<?
echo $form->radio('Enquiry.contact_id', $contacts, array('legend' => 'Choose Contact'));
?>
<button id="addContact">Add New Contact</button>

<div id="addUserDiv">
    <?
    echo $form->input('first_name', array('class' => 'required'));
    echo $form->input('last_name', array('class' => ''));
    echo $form->input('email', array('class' => 'email'));
    echo $form->input('job_title');
    echo $form->input('phone');
    echo $form->input('phone_extension');
    echo $form->input('mobile');
    echo $form->input('fax');

    echo $form->input('direct_phone');
    echo $form->input('notes');
    ?>
</div>