I have an AJAX chat room module in Drupal and I am trying to insert BBCode stlye tex tags to the submit box when the user clicks Insert Tex. I managed to get the following code to work the first time but afterwards when I click Insert Tex it inserts the tex tags triple times.

$('#edit-chatroom-message-entry-submit').click(function (e) {
  e.preventDefault();
  e.stopPropagation();
  if ($('#edit-chatroom-message-entry-box').val()){
    Drupal.chatroom.postMessage($('#edit-chatroom-message-entry-box').val());
    $('#edit-chatroom-message-entry-box').val('').focus();
  }
});

$('#edit-chatroom-tex-submit').click(function (e) {
  e.preventDefault();
  e.stopPropagation();
  $('#edit-chatroom-message-entry-box').val($('#edit-chatroom-message-entry-box').val() + '[tex][/tex]');
});

I would appreciate it if a suggestion could be make to make the code work properly.