[jQuery] Can't append html to textare after jquery.form ajax submit

[drewtown]

I am writing a user input form and I have buttons set up that add [b]
[i][u] etc tags to the form like BBCode.  The user can then submit it
(uses the jquery.form plugin) and everything works fine.  If the user
then tries to type more and use the buttons again the buttons don't
append to the textare anymore.

Any ideas

[code below]

        $(document).ready(function() {

                $('#journalForm').ajaxForm({
                        dataType:  'json',
                        success:   process
                });

                function process(json) {
                        blah blah blah irrelevant
                }

                $('#bold,#italic,#underline').click(function() {
                        $('#body').append($(this).val());
                });
        });