Help with sticky menu?

Using available code, Ive have a sticky menu that sticks to the top of the page when the user scrolls using JQuery. But for the world of me I just cant get it to centre, it stays left. I've tried padding but that messes up the JQuery bit.
I just want it centred under my title and to stay centred when scrolled.
I've tried text-align:center, I've tried creating a new div id with rules margin:auto; text-align:center; but it just wont centre.
can anybody help?
Heres the code i have
JQuery…
Help with sticky menu?

See original post by danblukk