Optional CCK fields

1. Is the开发者_开发知识库re a module in Drupal to enable or not a text field or more in general a CCK field? For example a check box option: when this is checked a textfield appears below, otherwise it is not visible.

2. Is there a module to switch between 2 CCK fields? For example I have 2 text areas, and I can only fill one (the others should be automatically disabled). The user can decide which one to enable with a radio button or by checking a check box.

thanks

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Although I haven't used it extensively, the Conditional Fields module seems like it might do what you want.

Otherwise, you can check into using the Form API's #ahah parameter to roll your own.

Hope that helps!