for resizable UI

hi jQuery,
i am making a UI in which there are 2 divs.
i used resizable and dragable for both.
i need help regarding if i increase the size of 1st div then size
of second should get decresed and vice-versa.
you have a methd in which if i increse size of one then others
size also increses but i need a reverse of that.
Thanks & Regards,
Kapil Jaiswal