HTML and JAVASCRIPT

Hello

This is what I am trying to do:

I have a Page1.html and when i click on a button i want to divide the screen in two with a frame and in the second part of the screen I want to display Page2.html. I also want to know how to click on a button on the Page2.html and display Page3.html at the bottom of the screen.

How can I do this using JAVASCRIPT?

Stevie