( function() {
	var is_webkit = navigator.userAgent.toLowerCase().indexOf( 'webkit' ) > -1,
	    is_opera  = navigator.userAgent.toLowerCase().indexOf( 'opera' )  > -1,
	    is_ie     = navigator.userAgent.toLowerCase().indexOf( 'msie' )   > -1;

	if ( ( is_webkit || is_opera || is_ie ) && 'undefined' !== typeof( document.getElementById ) ) {
		var eventMethod = ( window.addEventListener ) ? 'addEventListener' : 'attachEvent';
		window[ eventMethod ]( 'hashchange', function() {
			var element = document.getElementById( location.hash.substring( 1 ) );

			if ( element ) {
				if ( ! /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) )
					element.tabIndex = -1;

				element.focus();
			}
		}, false );
	}
})();


/*
playback timings (ms):
  LoadShardBlock: 226.87 (3)
  esindex: 0.01
  captures_list: 296.915
  CDXLines.iter: 10.534 (3)
  PetaboxLoader3.datanode: 242.156 (4)
  exclusion.robots.fetch: 54.921 (4)
  exclusion.robots: 55.467
  exclusion.robots.policy: 0.279
  RedisCDXSource: 1.598
  PetaboxLoader3.resolve: 555.162
  load_resource: 585.741
*/