Kalaivani Nair 0 Newbie Poster

here's my site: http://fspb.valse.com.my/
If you view on mobile version the menu appears. When I scroll the content the menu scrolls along which I dont want to happen. I tried to use this fiddle into my html and css but it doesn't work at all in wordpress.

js fiddle: http://jsfiddle.net/KBne4/12/