// JavaScript Document

$(document).ready(function() {

    //Execute the slideShow, set 6 seconds for each images
    slideShow(5000);
});

function slideShow(speed) {


    //append a LI item to the UL list for displaying caption
    $('ul.slideshow').append('<li id="slideshow-caption" class="caption"><div class="slideshow-caption-container"><h3></h3><p></p></div></li>');

    //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:first').css({opacity: 1.0});

    //Get the caption of the first image from REL attribute and display it
    $('#slideshow-caption h3').html($('ul.slideshow a:first').find('img').attr('title'));
    $('#slideshow-caption p').html($('ul.slideshow a:first').find('img').attr('alt'));

    //Display the caption
    $('#slideshow-caption').css({opacity: 0.7, bottom: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().attr('id') == 'slideshow-caption')? $('ul.slideshow li:first') :current.next()) : $('ul.slideshow li:first'));

    //Get next image caption
    var title = next.find('img').attr('title');
    var desc = next.find('img').attr('alt');

    //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}, 1000);

    //Hide the caption first, and then set and display the caption
    $('#slideshow-caption').animate({bottom:-70}, 500, function () {
            //Display the content
            $('#slideshow-caption h3').html(title);
            $('#slideshow-caption p').html(desc);
            $('#slideshow-caption').animate({bottom:0}, 600);
    });

    //Hide the current image
    current.animate({opacity: 0.0}, 1000).removeClass('show');

}