https://stoneforensics.com/wp-content/themes/lowbest/assets/js/skip-link-focus-fix.js?ver=20151215

1/**
2 * File skip-link-focus-fix.js.
3 *
4 * Helps with accessibility for keyboard only users.
5 *
6 * Learn more: https://git.io/vWdr2
7 */
8(function() {
9	'use strict';
10	var isIe = /(trident|msie)/i.test( navigator.userAgent );
11	if ( isIe && document.getElementById && window.addEventListener ) {
12		window.addEventListener( 'hashchange', function() {
13			var id = location.hash.substring( 1 ),
14				element;
15			if ( ! ( /^[A-z0-9_-]+$/.test( id ) ) ) {
16				return;
17			}
18			element = document.getElementById( id );
19			if ( element ) {
20				if ( ! ( /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) ) ) {
21					element.tabIndex = -1;
22				}
23				element.focus();
24			}
25		}, false );
26	}
27})();