Menu Question

I try to do the following,

I have a special section of my Blog where i want to show a different Menu then on the other pages.

FX

-Home (Menu1)
—-Page1(Menu1)
—-Page2(Menu1)
—-Page3(Menu1)
—-Page4(Menu2)
——–Page5(Menu2)
——–Page6(Menu2)
——–Page7(Menu2)

As you see on Home and Page 1-3 there should appear the Menu1 and on Page4 and Subpages Menu2.

Is there a way to do that?

Thanks a lot for helping.