Triplets at the other direction

[Joshua Koo]

Hi,

When I have triplet, the 3 is in the same direction of the stems (eg. 3 is at 
the bottom if stem are down) . However I like it at the side of the note head, 
which means the opposite direction the stem are facing. (eg. I would like the 3 
to be above the notes when stems are down).

If I were to use the \tupletUp or \tupletDown then I would have to specify 
every triplets I have. Is there a \trupletOpposite? Or maybe there's ae 
property to be set to negative?

Thank you in advanced,
Joshua Koo