he sender's primary SMTP address.
            FindPerson(_mailboxItem.sender.emailAddress);
        }

        function AddContactToNavBar(contactEmail) {
            // Enhancement opportunity: reorganize code to get and display person's picture in navigation bar.
            // Store the SMTP address as data-id.
            $('#contactBar').append('<div class="contact contactPreview" data-id="' + contactEmail + '" title="' + contactEmail + '"><img class="contactThumbnail" src="img/anonymous.jpg"/></div>')