The following attributes can be applied to the <FRAMESET> element
for additional control.
FRAMEBORDER="yes|no"|0
This attribute enables you to turn off the border around frames in the frameset.
For the borders to not be drawn, all the frames sharing a common border must have
their FRAMEBORDER attribute set to "no". This attribute can be used
with the <FRAME> tag to set the borders for a single frame.