Small problem with my site

[thesween]

Hello Ive come across a problem while making my site... Have a look at the attached.. I have my index page which moves around when you press the menu.. My first page is a house, if you click on the circle there, it goes inside the house where there are three rooms.. the rooms work the same as the main menu when you load it by itself... However, the rooms load up inside the home page which somehow stops it working properly..

To see what I mean, have a look at 'inside' first, then 'index' to see how it stops working... if anyone can help, I really appreciate it! Unzip them all in the same file, obviously