jQuery(document).ready(function() {
	//Execute the slideShow, set 4 seconds for each images
	slideShow(8000);
});

function slideShow(speed) {

	//append a LI item to the UL list for displaying caption
	jQuery('ul.slideshow').append('<li id="slideshow-caption" class="caption"><div class="slideshow-caption-container"><h3></h3><p></p></div></li>');
        //add the back/forward arrows as a cs-navigation div
        jQuery('ul.slideshow').append("<div id='cs-navigation'></div>");
        jQuery('#cs-navigation').hide();
        jQuery('#cs-navigation').append("<a href='#' id='cs-prev' class='cs-prev'></a>");
        jQuery('#cs-navigation').append("<a href='#' id='cs-next' class='cs-next'></a>");
        jQuery('#cs-prev').click( function(e){
                e.preventDefault();
                clearInterval(timer);
                gallery(true);
		timer = setInterval('gallery()',speed);
        });

        jQuery('#cs-next').click( function(e){
                e.preventDefault();
                clearInterval(timer);
                gallery();
		timer = setInterval('gallery()',speed);
        });




	//Set the opacity of all images to 0
	jQuery('ul.slideshow li').css({opacity: 0.0});

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

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

	//Display the caption
	jQuery('#slideshow-caption').css({opacity: 0.7, bottom:0});

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

	//show nav on mouse over
	jQuery('ul.slideshow').hover(
		function(){ jQuery('#cs-navigation').show()},
		function(){ jQuery('#cs-navigation').hide()}
	);



}

function gallery(goBack) {

        if(!goBack) goBack = false;

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

	//Get next image, if it reached the end of the slideshow, rotate it back to the first image
        if (!goBack) {
            var next = ((current.next().length) ? ((current.next().attr('id') == 'slideshow-caption') ? jQuery('ul.slideshow li:first') : current.next()) : jQuery('ul.slideshow li:first'));
        } else {
            var next = current.prev().length ? current.prev() : jQuery('ul.slideshow li:last').prev();
        }
	//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
	jQuery('#slideshow-caption').animate({bottom:-70}, 300, function () {
			//Display the content
			jQuery('#slideshow-caption h3').html(title);
			jQuery('#slideshow-caption p').html(desc);
			jQuery('#slideshow-caption').animate({bottom:0}, 500);
	});

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

}