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HTML 

              
                <!-- Navigation -->
<nav class="menu" id="a11y-menu" role="navigation" aria-label="Main menu">

  <ul class="nav level-1 list-reset" role="menubar" aria-hidden="false">
    <li class="has-subnav" role="menuitem" aria-haspopup="true">
      <a href="#about">About</a>
      <ul class="level-2 list-reset" data-test="true" aria-hidden="true" role="menu">
        <li role="menuitem"><a href="#news" tabindex="-1">News</a></li>
        <li role="menuitem"><a href="#governance" tabindex="-1">Governance</a></li>
        <li role="menuitem"><a href="#diversity" tabindex="-1">Diversity</a></li>
        <li role="menuitem"><a href="#contact" tabindex="-1">ContactUs</a></li>
      </ul>
    </li>

    <li role="menuitem" aria-haspopup="true">
      <a href="#academics">Academics</a>
      <ul class="level-2 list-reset" data-test="true" aria-hidden="true" role="menu" class="list-reset">
        <li role="menuitem"><a href="#programs" tabindex="-1">Degree Programs</a></li>
        <li role="menuitem"><a href="#faculty" tabindex="-1">Faculty</a></li>
        <li role="menuitem"><a href="#distance" tabindex="-1">Distance Learning</a></li>
        <li role="menuitem"><a href="#libs" tabindex="-1">Libraries</a></li>
      </ul>
    </li>

    <li role="menuitem" aria-haspopup="true">
      <a href="#admissions">Admissions</a>
      <ul class="level-2 list-reset" data-test="true" aria-hidden="true" role="menu" class="list-reset">
        <li role="menuitem"><a href="#undergraduate" tabindex="-1">Undergraduate</a></li>
        <li role="menuitem"><a href="#tuition" tabindex="-1">Tuition</a></li>
        <li role="menuitem"><a href="#financial-aid" tabindex="-1">Financial Aid</a></li>
      </ul>
    </li>

    <li role="menuitem" aria-haspopup="true">
      <a href="#visitors">Visitors</a>
      <ul class="level-2 list-reset" data-test="true" aria-hidden="true" role="menu" class="list-reset">
        <li role="menuitem"><a href="#events" tabindex="-1">Events</a></li>
        <li role="menuitem"><a href="#campus-map" tabindex="-1">Campus Map</a></li>
        <li role="menuitem"><a href="#parking" tabindex="-1">Parking</a></li>
      </ul>
    </li>
  </ul>	
</nav>
!

CSS 

              
                /*==================================================
  $A11Y Dropdown
  ==================================================*/

/* Top level nav */
.nav {
	float: left;
	margin: 20px 0;
}

/* Dropdowns */
.nav ul {
	position: absolute;
	top: 2.5em;
	left: -9999px;
	opacity: 0;
	transition: 0.1s linear opacity;
	min-width: 150px;
}

.nav li {
	float: left;
	position: relative;
}

/* Top level nav items */
.nav li > a {
	float: left;
	padding: 10px 15px;
	text-decoration: none;
}

/* Top level hover state, preserve hover state when hovering dropdown  */
.nav li > a:hover,
.nav li > a:focus,
.nav li:focus > a,
.nav li:hover > a {
	background: #EFEFEF;
	outline: 0;
}

.nav li:hover ul,
.nav li:focus ul,
ul.show-menu {
	left: 0;
	opacity: 0.99;
}

.nav ul li {
	float: none;
	position: static;
}

.nav ul a {
	float: none;
	display: block;
	font-size: 12px;
	text-shadow: none;
	transition: 0.1s linear all;
}

.nav ul a:hover,
.nav ul a:focus {
	text-shadow: none;
}


/*==================================================
  $Helpers
  ==================================================*/

.list-reset {  
	margin: 0;
	padding: 0;
	list-style: none;
}
!

JS 

              
                $(document).ready(function() {
  // Setup the a11y nav
	$('.nav').setup_navigation();
  
  // RWD Nav Pattern
  $('body').addClass('js');
  var $menu = $('#menu'),
		  $menulink = $('.menu-link'),
		  $menuTrigger = $('.has-subnav > a');

		$menulink.click(function(e) {
			e.preventDefault();
			$menulink.toggleClass('active');
			$menu.toggleClass('active');
		});
		
		$menuTrigger.click(function(e) {
			e.preventDefault();
			var $this = $(this);
			$this.toggleClass('active').next('ul').toggleClass('active');
		});
});
/*
$(function(){
	$('.nav').setup_navigation();
});
*/
var keyCodeMap = {
        48:"0", 49:"1", 50:"2", 51:"3", 52:"4", 53:"5", 54:"6", 55:"7", 56:"8", 57:"9", 59:";",
        65:"a", 66:"b", 67:"c", 68:"d", 69:"e", 70:"f", 71:"g", 72:"h", 73:"i", 74:"j", 75:"k", 76:"l",
        77:"m", 78:"n", 79:"o", 80:"p", 81:"q", 82:"r", 83:"s", 84:"t", 85:"u", 86:"v", 87:"w", 88:"x", 89:"y", 90:"z",
        96:"0", 97:"1", 98:"2", 99:"3", 100:"4", 101:"5", 102:"6", 103:"7", 104:"8", 105:"9"
}

$.fn.setup_navigation = function(settings) {

	settings = jQuery.extend({
		menuHoverClass: 'show-menu',
	}, settings);
	
	// Add ARIA role to menubar and menu items
	$(this).attr('role', 'menubar').find('li').attr('role', 'menuitem');
	
	var top_level_links = $(this).find('> li > a');

	// Added by Terrill: (removed temporarily: doesn't fix the JAWS problem after all)
	// Add tabindex="0" to all top-level links 
	// Without at least one of these, JAWS doesn't read widget as a menu, despite all the other ARIA
	//$(top_level_links).attr('tabindex','0');
	
	// Set tabIndex to -1 so that top_level_links can't receive focus until menu is open
	$(top_level_links).next('ul')
		.attr('data-test','true')
		.attr({ 'aria-hidden': 'true', 'role': 'menu' })
		.find('a')
		.attr('tabIndex',-1);
	
	// Adding aria-haspopup for appropriate items
	$(top_level_links).each(function(){
		if($(this).next('ul').length > 0)
			$(this).parent('li').attr('aria-haspopup', 'true');
	});
	
	$(top_level_links).hover(function(){
		$(this).closest('ul') 
			.attr('aria-hidden', 'false')
			.find('.'+settings.menuHoverClass)
			.attr('aria-hidden', 'true')
			.removeClass(settings.menuHoverClass)
			.find('a')
			.attr('tabIndex',-1);
		$(this).next('ul')
			.attr('aria-hidden', 'false')
			.addClass(settings.menuHoverClass)
			.find('a').attr('tabIndex',0);
	});

  $(top_level_links).focus(function(){
		$(this).closest('ul')
			// Removed by Terrill 
			// The following was adding aria-hidden="false" to root ul since menu is never hidden
			// and seemed to be causing flakiness in JAWS (needs more testing) 
			// .attr('aria-hidden', 'false') 
			.find('.'+settings.menuHoverClass)
			.attr('aria-hidden', 'true')
			.removeClass(settings.menuHoverClass)
			.find('a')
			.attr('tabIndex',-1);
		
    $(this).next('ul')
			.attr('aria-hidden', 'false')
			.addClass(settings.menuHoverClass)
			.find('a').attr('tabIndex',0);
	});
	
	// Bind arrow keys for navigation
	$(top_level_links).keydown(function(e){
		if(e.keyCode == 37) {
			e.preventDefault();
			// This is the first item
			if($(this).parent('li').prev('li').length == 0) {
				$(this).parents('ul').find('> li').last().find('a').first().focus();
			} else {
				$(this).parent('li').prev('li').find('a').first().focus();
			}
		} else if(e.keyCode == 38) {
			e.preventDefault();
			if($(this).parent('li').find('ul').length > 0) {
				$(this).parent('li').find('ul')
					.attr('aria-hidden', 'false')
					.addClass(settings.menuHoverClass)
					.find('a').attr('tabIndex',0)
					.last().focus();
			}
		} else if(e.keyCode == 39) {
			e.preventDefault();
			// This is the last item
			if($(this).parent('li').next('li').length == 0) {
				$(this).parents('ul').find('> li').first().find('a').first().focus();
			} else {
				$(this).parent('li').next('li').find('a').first().focus();
			}
		} else if(e.keyCode == 40) {
			e.preventDefault();
			if($(this).parent('li').find('ul').length > 0) {
				$(this).parent('li').find('ul')
					.attr('aria-hidden', 'false')
					.addClass(settings.menuHoverClass)
					.find('a').attr('tabIndex',0)
					.first().focus();
			}
		} else if(e.keyCode == 13 || e.keyCode == 32) {
			// If submenu is hidden, open it
			e.preventDefault();
			$(this).parent('li').find('ul[aria-hidden=true]')
					.attr('aria-hidden', 'false')
					.addClass(settings.menuHoverClass)
					.find('a').attr('tabIndex',0)
					.first().focus();
		} else if(e.keyCode == 27) {
			e.preventDefault();
			$('.'+settings.menuHoverClass)
				.attr('aria-hidden', 'true')
				.removeClass(settings.menuHoverClass)
				.find('a')
				.attr('tabIndex',-1);
		} else {
			$(this).parent('li').find('ul[aria-hidden=false] a').each(function(){
				if($(this).text().substring(0,1).toLowerCase() == keyCodeMap[e.keyCode]) {
					$(this).focus();
					return false;
				}
			});
		}
	});
	
	
	var links = $(top_level_links).parent('li').find('ul').find('a');
	$(links).keydown(function(e){
		if(e.keyCode == 38) {
			e.preventDefault();
			// This is the first item
			if($(this).parent('li').prev('li').length == 0) {
				$(this).parents('ul').parents('li').find('a').first().focus();
			} else {
				$(this).parent('li').prev('li').find('a').first().focus();
			}
		} else if(e.keyCode == 40) {
			e.preventDefault();
			if($(this).parent('li').next('li').length == 0) {
				$(this).parents('ul').parents('li').find('a').first().focus();
			} else {
				$(this).parent('li').next('li').find('a').first().focus();
			}
		} else if(e.keyCode == 27 || e.keyCode == 37) {
			e.preventDefault();
			$(this)
				.parents('ul').first()
					.prev('a').focus()
					.parents('ul').first().find('.'+settings.menuHoverClass)
					.attr('aria-hidden', 'true')
					.removeClass(settings.menuHoverClass)
					.find('a')
					.attr('tabIndex',-1);
		} else if(e.keyCode == 32) {
			e.preventDefault();
			window.location = $(this).attr('href');
		} else {
			var found = false;
			$(this).parent('li').nextAll('li').find('a').each(function(){
				if($(this).text().substring(0,1).toLowerCase() == keyCodeMap[e.keyCode]) {
					$(this).focus();
					found = true;
					return false;
				}
			});
			
			if(!found) {
				$(this).parent('li').prevAll('li').find('a').each(function(){
					if($(this).text().substring(0,1).toLowerCase() == keyCodeMap[e.keyCode]) {
						$(this).focus();
						return false;
					}
				});
			}
		}
	});

		
	// Hide menu if click or focus occurs outside of navigation
	$(this).find('a').last().keydown(function(e){ 
		if(e.keyCode == 9) {
			// If the user tabs out of the navigation hide all menus
			$('.'+settings.menuHoverClass)
				.attr('aria-hidden', 'true')
				.removeClass(settings.menuHoverClass)
				.find('a')
					.attr('tabIndex',-1);
		}
	});

  $(document).click(function(){ $('.'+settings.menuHoverClass).attr('aria-hidden', 'true').removeClass(settings.menuHoverClass).find('a').attr('tabIndex',-1); });
	
	$(this).click(function(e){
		e.stopPropagation();
	});
}
!
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