To change the color of frame's border, use the bordercolor attribute. The attribute can be applied either to an entire set of frames, using the <frameset> tag, or to individual frames, using the <frame> tag. The syntax for this attribute is:
Applying the bordercolor attribute to the frameset tag affects all the frames and nested frames within the set.
If you apply bordercolor to a single <frame> tag, this particular frame border changes in Internet Explorer, but not in Netscape.
Try how it works with your browser: (the border color will be changed to red)
To change the width of the frame borders, use the border attribute within the <frameset> tag:
where value is the width of the frame borders in pixels. One cannot change the width of individual frame borders.
Note that one can also change border width in Internet Explorer using the framespacing attribute. However, this attribute is not supported by Netscape Navigator.
Try how it works: