Name your frame, then in your link, instead of telling it to go…for example…to _self or _blank tell it to go to the name that you named your frame.
Wow, that was incredibly rhymey. If your frame was named InLine, and since you are saying hyperlinking, I am assuming you are talking HTML, your link would be
<a target="InLine" href="pagetoload.html">
if you are talking about Flash it would be
getURL(pagetoload.html,“InLine”);
or something along those lines.
EDIT ( dan4885 ):To not have the forum counter part your HTML then use the forum PHP tags: use {php} but with [ ] if ya know what I mean.