2 * Makes "skip to content" link work correctly in IE9, Chrome, and Opera
3 * for better accessibility.
5 * @link http://www.nczonline.net/blog/2013/01/15/fixing-skip-to-content-links/
9 var isWebkit = navigator.userAgent.toLowerCase().indexOf( 'webkit' ) > -1,
10 isOpera = navigator.userAgent.toLowerCase().indexOf( 'opera' ) > -1,
11 isIE = navigator.userAgent.toLowerCase().indexOf( 'msie' ) > -1;
13 if ( ( isWebkit || isOpera || isIE ) && document.getElementById && window.addEventListener ) {
14 window.addEventListener( 'hashchange', function() {
15 var id = location.hash.substring( 1 ),
18 if ( ! ( /^[A-z0-9_-]+$/.test( id ) ) ) {
22 element = document.getElementById( id );
25 if ( ! ( /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) ) ) {
26 element.tabIndex = -1;
31 // Repositions the window on jump-to-anchor to account for admin bar and border height.
32 window.scrollBy( 0, -53 );