Off-canvas navigations for mobile menu.

I'm following the tutorial of Tympanus: http://tympanus.net/codrops/2013/08/28/transitions-for-off-canvas-navigations/ . In this tutorial, after opened Panel menu ( .st-menu ) we can turned off it by click to the content ( st-content ). But I want to make a button at the Panel Menu that can close the Panel Menu.
Off-canvas navigations for mobile menu.

See original post by chotoan