Border thickness
You can use the nonstandard border
attribute in the frameset
element to specify the thickness of the frame borders
in pixels. The default thickness varies by browser. Although border
is not part of the Frameset DTD, it is fairly well supported by current browsers.
Tip
Turning the frameborder
off removes only the 3D border, but it leaves a gap between the frames. To remove this gap and give the page a smooth, seamless appearance, use the border
attribute with a setting of 0 pixels: <frameset frameborder="0" border="0">
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