Have three frames in a JSP page, one sits above (Frame A) and two are below (Frame B and Frame C) (Frame B and Frame C are in one row, say, each has 50% position of the window width).

My question is:
How to only show the boarder of the below two frames (Frame B and Frame C)?

Solved, but the difficult part is the width of the middle boarder between the two frames. When you set both to frameboarder=1, the middle one is wider than others. Finally I only set one frame has boarder and another one I set the table boarder=1 which is right in the other frame. Nobody can see the difference then.