If you are interested in the FRAMEBORDER attribute for <FRAME ...>, it was used in this manner to create the frames here:

<FRAMESET ROWS="*,40%,30%,*,*">
     <FRAME SRC="fbRow1.html">
     <FRAME SRC="fbRow2.html" FRAMEBORDER=NO>
     <FRAME SRC="fbRow3.html" FRAMEBORDER=NO>
     <FRAME SRC="fbRow4.html">
     <FRAME SRC="fbRow5.html">

<NOFRAMES>NOFRAMES stuff
</NOFRAMES>

</FRAMESET>

There should be no border between this frame and the frame above, though there may be an empty space between them.