Forum Moderators: open
For example, if you wanted to center a frame that is 600x400, use an "empty" frame document that fills in the "padding" with your background of choice. It looks something like this:
<frameset cols="*,600,*">
<frame src="empty.html">
<frameset rows="*,400,*>
<frame src="empty.html">
<frame src="centered-content.html">
<frame src="empty.html">
</frameset>
<frame src="empty.html">
</frameset>