Hiding selection screen fields upon clicking a button

Hi .

I have a requirement like we need to hide and bring back the selection screen fields upon clicking a button( Expand and collapse in the same button) .

in ABAP Query,we can maintain this, for the variant we created.

We need this functionality on the selection-screen presently.

How to achieve this in the selection -screen?

Valuale pointers are desparately needful.

Regards,

SSR.