ahah calls

Hi ,
I am working on the module drupal commons. The question is that on facebookstatus form , there's an ahah requests which renders the new status posted by clicking submit button.
I have added another button ('add a field') to the form which does the following :
1. Create a text-field to enter additional content (this is ahah driven through a separate function)

My question is : when i click the 'add a field' button , it creates a new textfield and i want that field to hide on Submit form click , which primarily adds the new status to the wall.

Both the buttons have separate wrappers and separate functions for ahah calls.

Please help,
Can't figure it out at all.