$(document).ready(function() {
    $('ul#slideshow li:first').addClass('show');
    if ($('ul#slideshow li').length > 1) {
        //Execute the slideShow, set 4 seconds for each images
        slideShow(4000);
    }
});

function slideShow(speed) {
    //Set the opacity of all images to 0
    $('ul#slideshow li').css({ opacity: 0.0 });

    //Get the first image and display it (set it to full opacity)
    $('ul#slideshow li.show').css({ opacity: 1.0 });

    //Call the gallery function to run the slideshow	
    var timer = setInterval('gallery()', speed);

    //pause the slideshow on mouse over
    $('ul#slideshow').hover(function() {
        clearInterval(timer);
    }, function() {
        timer = setInterval('gallery()', speed);
    });
}

function gallery() {
    //if no IMGs have the show class, grab the first image
    var current = $('ul#slideshow li.show') ? $('ul#slideshow li.show') : $('ul#slideshow li:first');

    //Get next image, if it reached the end of the slideshow, rotate it back to the first image
    var next = (current.next().length) ? current.next() : $('ul#slideshow li:first');

    //Set the fade in effect for the next image, show class has higher z-index
    next.css({ opacity: 0.0 }).addClass('show').animate({ opacity: 1.0 }, 200);

    //Hide the current image
    current.animate({ opacity: 0.0 }, 200).removeClass('show');
}