Sticky Primary Nav for Genesis Sample theme

sticky-nav.js

( function ($) {

    // Make nav fixed.
    $( document ).ready(function() {
        $( '.nav-primary' ).css( {
            'position': 'absolute',
            'left': '0',
            'width': '100%',
            'z-index': '99'
        } ).delay( 1 ).css( 'top', $( '.site-header' ).height() );
        $( '.site-inner' ).css( 'margin-top', $( '.nav-primary').height() );
    });

    // Get distance from nav to top.
    var distance = $( '.site-header' ).outerHeight();

    // If distance less than 0.
    $( window ).scroll( function() {
        if ( $( window).scrollTop() >= distance ) {
            $( '.nav-primary' ).css( {
                'top': '0',
                'position': 'fixed'
            } );
        }
        else {
            $( '.nav-primary' ).css( {
                'top': $( '.site-header' ).height(),
                'position': 'absolute'
            } );
        }
    });

} )( jQuery );