Preventing "Select All" and "Select None" links from being rendered by the selectMany tag

[Richard Yee]

Does anyone know if there is a way to prevent the "Select All" and 
"Select None" links from being displayed at the top of a table 
containing a selectMany tag? The reason I need this is that some rows in 
the table are disabled based on the rows that the user selects. 
Therefore, I can't let the user press the "Select All" link when no 
items are selected.

Thanks,
Richard