I want to know how to do that!

I have my page 1 with no frame
=> Page1.html

AND I have my page 2 divided in 2 horizontal frame
Page2.html
-frameup => Frameup.html
-framedown => The pages I need

When I click on a link in my page 1, i want that link to be call my multiframe page 2, but i want this page in the framedown of page2.html

Is there a way to do that with javascript on anything else?
Or by passing variable values for esch?