(function ($) {
    $(function () {

        var $title = $('#title');

        // set required fields
        var required = [$title];
        for (var i in required) {
            if (!required.hasOwnProperty(i)) continue;
            required[i].prop('required', true);
        }

        // init input label actions
        var subtitlehint = function(id) {
            var input = $('#' + id), prompt = $('#' + id + '-prompt-text');
            if ('' === input.val()) {
                prompt.removeClass('screen-reader-text');
            }
            prompt.click(function() {
                $(this).addClass('screen-reader-text');
                input.focus();
            });
            input.blur(function() {
                if ( '' === this.value ) {
                    prompt.removeClass('screen-reader-text');
                }
            }).focus(function() {
                prompt.addClass('screen-reader-text');
            }).keydown(function(e) {
                prompt.addClass('screen-reader-text');
                $(this).unbind(e);
            });
        };
        subtitlehint('subtitle');

        var fixtabindex = function(e) {
            var keyCode = e.keyCode || e.which;
            if (9 === keyCode) {
                var target = '';
                switch ($(this).attr('id')) {
                    case 'title':
                        target = '#subtitle';
                        break;
                    case 'subtitle':
                        target = 'textarea#content';
                        break;
                }
                if ('' !== target) {
                    e.preventDefault();

                    if ( (target !== 'textarea#content') || $('#wp-content-wrap').hasClass('html-active') ) {
                        $(target).focus();
                    } else {
                        tinymce.execCommand('mceFocus', false, 'content');
                    }
                }
            }
        };
        $(document).on('keydown', '#title, #subtitle', fixtabindex);

    });
})(jQuery);