Make drop down navigation more accessibile via tabs. Uses Bootstrap classes

nav-script.js

	//If on dropdown link keep it open
	$( document ).ready(function() {
		$("ul.dropdown-menu li a").on('focus', function() {
		    $(this).closest('ul.dropdown-menu').addClass('show');
		});
		             
		$("ul.dropdown-menu li a").on('blur', function() {
		    $(this).closest('ul.dropdown-menu').removeClass('show');
		});
	});

nav-style.css

// Show on focus
ul.nav li.dropdown a:focus + ul.dropdown-menu {
 	display: block;
 }