Make my css menu stay on top of the screen?

Question

like in http://facebook.com they have a nav bar type thing that stays at the top of the page how can i do that with my code. i have my css advanced menu working except for that one problem. well here is my link to my jsfiddle

Js fiddle

Main Parts of css

#cssmenu ul { margin: 0; padding: 0;}
#cssmenu li { margin: 0; padding: 0;}
#cssmenu a { margin: 0; padding: 0;}
#cssmenu ul {list-style: none;}
#cssmenu a {text-decoration: none;}
#cssmenu { height: 42px; background-color: rgb(35,35,35); box-shadow: 0px 2px 3px rgba(0,0,0,.4);}

now if im not mistaken this has to be done with this part if not check the JsFiddle

Answer 1

Just a thought, don't you need to add z-index: 1000; so that it floats over all the items on the page?

Answer 2

Add the following to your menu css:

#cssmenu {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
}

That's basically how they do it.