(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);
    }
})();