Add Nagging Menu to WordPress Site

functions-enqueue.php

<?php

add_action( 'init', 'wps_register_nagging_script' );
/**
 * Register Nagging script
 * 
 * @uses CHILD_THEME_VERSION set this via wp_get_theme()->Version
 * @link https://gist.github.com/4477270 Sets Child Theme Constants via wp_get_theme()
 * @link https://gist.github.com/4083811 For jQuery alternative to be placed in footer
 */
function wps_nagging_script() {
  $suffix = ( WP_DEBUG || SCRIPT_DEBUG ) ? '.js' : '.min.js';
  wp_enqueue_script(
    'nagging-menu',
    get_stylesheet_directory_uri() . '/js/nagging-menu' . $suffix,
    array( 'jquery' ),
    CHILD_THEME_VERSION, // I set this via wp_get_theme()->Version, @link https://gist.github.com/4477270 
    true 
  );
} 

functions-register.php

<?php

add_action( 'init', 'wps_register_nagging_script' );
/**
 * Register Nagging script
 * 
 * @uses CHILD_THEME_VERSION set this via wp_get_theme()->Version
 * @link https://gist.github.com/4477270 Sets Child Theme Constants via wp_get_theme()
 * @link https://gist.github.com/4083811 For jQuery alternative to be placed in footer
 */
function wps_register_nagging_script() {
  $suffix = ( WP_DEBUG || SCRIPT_DEBUG ) ? '.js' : '.min.js';
  wp_register_script(
    'nagging-menu',
    get_stylesheet_directory_uri() . '/js/nagging-menu' . $suffix,
    array( 'jquery' ),
    CHILD_THEME_VERSION, // I set this via wp_get_theme()->Version, @link https://gist.github.com/4477270 
    true 
  );
} 

add_action( 'wp_enqueue_scripts', 'wps_nagging_script' );
/**
 * Enqueue Nagging script if on home/archive page
 */
function wps_nagging_script() {
  if ( is_home() || is_front_page() || is_archive() || is_tax() )
    wp_enqueue_script( 'nagging-menu' );
}

nagging-menu.js

jQuery(document).ready(function($) {
  "use strict";
  
  // Change #nav to #subnav for Genesis default Secondary Menu
  var menu = $('#nav').find('.menu'),
		pos = menu.offset();
		
		// Add Default class
		menu.addClass('default');
		$(window).scroll(function(){
			if($(this).scrollTop() > pos.top+menu.height() && menu.hasClass('default')){
				menu.fadeOut('fast', function(){
					$(this).removeClass('default').addClass('fixed').fadeIn('fast');
				});
			} else if($(this).scrollTop() <= pos.top && menu.hasClass('fixed')){
				menu.fadeOut('fast', function(){
					$(this).removeClass('fixed').addClass('default').fadeIn('fast');
				});
			}
		});

});

nagging-menu.min.js

jQuery(document).ready(function(e){"use strict";var t=e("#nav").find(".menu"),n=t.offset();t.addClass("default");e(window).scroll(function(){if(e(this).scrollTop()>n.top+t.height()&&t.hasClass("default")){t.fadeOut("fast",function(){e(this).removeClass("default").addClass("fixed").fadeIn("fast")})}else if(e(this).scrollTop()<=n.top&&t.hasClass("fixed")){t.fadeOut("fast",function(){e(this).removeClass("fixed").addClass("default").fadeIn("fast")})}})})

style.css

#nav .fixed,
#subnav .fixed,
.fixed {
	background: rgb(0,0,0); /* Fallback */
	background: rgba(0,0,0,0.97); /* All modern browsers */
	filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#00000000', endColorstr='#00000000'); /* IE */
	-webkit-box-shadow: 0 0 40px #222;
	-moz-box-shadow: 0 0 40px #222;
	box-shadow: 0 0 40px #222;
	left: 0;
	top: 0;
	position: fixed;
	width: 100%;
}

#nav .default,
#subnav .default,
.default {
}