var _news = null;
var _currentNews = 0;
$(document).ready(function() {
_news = $('#news_preview_content .news_preview_item');
    _news.animate({ opacity: 0 }, 0);
    _news.hide();
    $(_news[0]).animate({ opacity: 1 }, 0);
    $(_news[0]).show();
    $("#news_preview_buttons .button.right").click(function() {
        nextNews();
    });
    $("#news_preview_buttons .button.left").click(function() {
        prevNews();
    });

});

function nextNews() {
    $(_news[_currentNews]).animate({ opacity: 0 }, 'slow', function() {
        $(_news[_currentNews]).hide();
        if (_currentNews >= (_news.length - 1))
            _currentNews = 0;
        else
            _currentNews++;
        $(_news[_currentNews]).show();
        $(_news[_currentNews]).animate({ opacity: 1 }, 'slow');
    });
}

function prevNews() {

    $(_news[_currentNews]).animate({ opacity: 0 }, 'slow', function() {
        $(_news[_currentNews]).hide();
        if (_currentNews == 0)
            _currentNews = _news.length - 1;
        else
            _currentNews--;
        $(_news[_currentNews]).show();
        $(_news[_currentNews]).animate({opacity: 1}, 'slow');
    });
}