In the frame page's HTML, we assign names for the left and right frame to help tell the pages which frame to appear in. They are represented in the a href tag.

{a href="page.html" target="nav"} will put the page into the left hand side, and {a href="page2.html" target="doc"} will put it in the right hand side.

It is important that each and every link you put in a frames page has some target indicator

If the linke leads to a paage that is not part of your frames (like someone else's page, you need to include target="_top" in the tag.