treecol.editable

editable
Type: boolean
Allows the contents of cells in the column to be changed, especially useful when type="checkbox". When the user double-clicks an editable cell, a text field appears in which the user can edit the contents of the cell.
The tree must also be marked as editable in order for this to work. Individual treecell elements in the column may be marked editable="false" in order to disable editing.