var slideSwitchIntervalId = 0;

function slideSwitch(slidenum)
{
    var $active = $('#slideshow img.active');
    var $activeButton = $('#slideshow li.active');

    if ($active.length == 0)
    {
        $active = $('#slideshow img:last');
        $activeButton = $('#slideshow li:last');
    }

    if (slidenum == -1)
    {
        var $next = $active.next().length ? $active.next() : $('#slideshow img:first');
        var $nextButton = $activeButton.next().length ? $activeButton.next() : $('#slideshow li:first');
    }
    else
    {
        var $next = $($('#slideshow img').get(slidenum));
        var $nextButton = $($('#slideshow li').get(slidenum));

        clearInterval (slideSwitchIntervalId);
    }

    if ($next.hasClass('active'))
        return;

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

    $activeButton.removeClass('active');
    $nextButton.addClass('active');

    $next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, 1000, function() {
            $active.removeClass('active last-active');
        });
}

$(document).ready(function()
{
    $.each($('#slideshow li'), function(index, value)
    {
        $(value).click(function()
        {
            slideSwitch($('#slideshow li').index(this));
        });
    });
});

$(function()
{
    slideSwitchIntervalId = setInterval("slideSwitch(-1)", 8000);
});