Using Frame Extensions
Netscape Navigator support extensions to the <FRAMES> tag that allow you to change border size and appearance. To define color for your frame borders, use the following tags:
<FRAMESET BORDERCOLOR=color>
or
<FRAME BORDERCOLOR=color>
where color is either the color name or color value.
Enter the BORDERCOLOR property in the <FRAMESET> tag to change all the frame border colors in a set of frames.
Enter the property in the <FRAME> tag to change the color of a single frame border.
To change the width of your frame border , use the tag:
<FRAMESET BORDER=value>
where value is the width of the border in pixels. You cannot change the width of individual frame borders.