var oInterval;

function slideSwitch() {
    var $active = $('.slideshow IMG.active');
    if ( $active.length == 0 ) $active = $('.slideshow IMG:last');

    var $next =  $active.next().length ? $active.next()
        : $('.slideshow IMG:first');

    $active.addClass('last-active');

    //$next.css({ margin: ((330 - $active.height()) / 2) + 'px ' + ((520 - $active.width()) / 2) + 'px' });
    $next.css({ opacity: 0.0 })
        .addClass('active')
        .animate({ opacity: 1.0 }, 1000, function() {
            $active.removeClass('active last-active');
        });
    $active.animate({opacity: 0.0}, 1000);
}

$(function() {
    if ($('.slideshow IMG.active'))
        oInterval = setInterval("slideSwitch()", 2000);
});