Frame Border not show and resize in firefox

Hi ,
I am not geting frame border in firefox i want only right border of
frame to be show and all other border are hidden it work in IE but in
firefox it not show border and due to that i am not able to resize the
frame also i am try using border-right-style and frameborder="1" it
work in firefox it show all border in IE and i want only right border
to show if
u have any idea then please mail me.