Click Link – Pg “reload”

I’m fairly new to wp, but have been using the support forums when I need help with something. Here is my problem.

My navigation bar is positoned in the middle of the page and the content section is below it. When I click a link in the navigation bar, my page will basically reload, jump to the top, and display the correct page. Basially is there anyway to make my content load how it would in an I-Frame setting?