suggest.aria.3

switch (event.keyCode) {
    case ik_utils.keys.down: // select next suggestion from list
                selected = plugin.list.find('.selected');
                if(selected.length) {
                    msg = selected.removeClass('selected').next().addClass('selected').text();
                } else {
                    msg = plugin.list.find('li:first').addClass('selected').text();
                }
                plugin.notify.text(msg); // add suggestion text to live region to be read by screen reader
                break;
            case ik_utils.keys.up: // select previous suggestion from list
                selected = plugin.list.find('.selected');
                if(selected.length) {
                    msg = selected.removeClass('selected').prev().addClass('selected').text();
                }
                plugin.notify.text(msg);  // add suggestion text to live region to be read by screen reader
                break;

            default: // get suggestions based on user input
                plugin.list.empty();
                suggestions = plugin.getSuggestions(plugin.options.source, $me.val());
                if (suggestions.length > 1) {
                    for(var i = 0, l = suggestions.length; i < l; i++) {
                        $('<li/>').html(suggestions[i])
                        .on('click', {'plugin': plugin}, plugin.onOptionClick) // add click event handler
                        .appendTo(plugin.list);
                    }
                    plugin.list.show();
                } else {
                    plugin.list.hide();
                }

        break;
    }