I have a grid with 30 rows and 18 columns. I only want the user to be able to select/ activate 4 of the rows (based on value) and only some of the cells based on value at runtime. I would prefer to do this in vb (code behind) but could use JavaScript if requried.  In pseudo code:

If not row.activableflag then
           set all cells in row not activeable
Else
          if cellvalue > 0 then
                set cell activable
          else
                set cell notactivable
           end if
End If