Link Bleed Through?

Probably not the right words to use for the topic, but maybe it helps. I have a website I am building and the main/home page is stationary, while the other 5 pages shift in and out over the main page when their corresponding button is clicked.

Problem is, while my other pages (example contact page) is displayed, the links to the home page are accessible and usable through the displayed page…hence bleed through! What can I do to solve this problem because I don’t want someone thinking they are clicking on one thing and then getting info that is availble from the main page. I can’t understand what is causing the bleed through and/or how to fix it.

Help please!:goatee: