Private Sub Workbook_SheetActivate(ByVal Sh As Object)
If Not IsDate("1/" & Sh.Name) Then Exit Sub
Dim col%
Application.ScreenUpdating = False
Sh.Columns.Hidden = False 'RAZ
For col = 4 To 81 'de D à CC
If Sh.Cells(6, col) = "J" Then
If Application.CountA(Cells(7, col).Resize(31, 2)) = 0 Then Columns(col).Resize(, 2).Hidden = True
End If
Next
End Sub