Nav to stop, and close till I click on close botton

Nav to stop, and close till I click on close botton

Hello every one. I was asked to implement this nav to this Website I am working for http://decormouldings.org/hover-nav.html I made this mock up with all the code included in, so you can see how this script works.

But now the owner of the site wants the Nav to stop once is clicked, then have a close botton to close the Nav.

Right now the Nav works, that if I hover ontop of it, it opens, and stays open for a few secs. But now, he wants it to stay open, till I click a close botton.

I am not (for now) a Jquery Ninja like many of you. Can any one give me some pointers / help? Please!

Thanks,