help!

I have a frameset with a left and right frame. The left frame contains
a javascript for menubar rollovers and clicking. The right frame contains
page content including a small site nav bar at the bottom.

I need to tell the javascript in the left frame about the selection made
from the bottom nav bar in the right frame. I also need to change the right
frame to the new frame content at the same time. I'd like to do this by controlling
the javascript in the left frame rather than reloading the left frame.

Any ideas? post something here or e-mail me! THANKS!!!