change object type in cell programmatically

Hi,

I have a cell that contains a text field.  Based on a selection, I would like to change the text field to a drop down and populate it.

This needs to be done in the script of the table.

My question is is this possible with livecycle?  If so, how can the cell contents be removed/replace with new contents?

Is there a better way to have the same end result?

Thanks for any help