applescript for keyboard input

[mark mitchell]

I looking for an applescript that will switch the input to and from 
Kotoeri (Japanese input).  Kotoeri is a keyboard choice in the finder, 
so any applescript which switches among keyboards would probably work 
fine.  I have some fields that require Japanese inputs and others that 
require English, so it would be nice if I could automatically switch the 
input depending on the selected field.  (Right now I only need mac, but 
for the future, if anyone has a windows solution as well....:-))
Thanks,

mark mitchell
Japan