Controlling TOC using a button in captivate 8

Hi,

We are trying to show/hide TOC using a button. When, the user clicks the button, we were able to show the TOC using the on success-show TOC action. But is it possible to hide the TOC using the same button, but when the user clicks it again/second instance.

Please let me know the possibilities.

Thanks
Vidyalakshmi