Native template fixed header

Hi, I am using the Native template and need to have the header and footer in a fixed position at the top of the screen when a user scrolls. Can someone give me a CSS code for this to happen? Thanks

@mattyh Try CSS

/* Fixed Header */
header#header {
   position: fixed;
   top: 0;
   width: 100%;
   padding-top: 80px;
   z-index: 999;
}
div#pageWrapper {
   margin-top: 180px;
}

You want fixed footer to top?