// http://www.queness.com/post/152/simple-jquery-image-slide-show-with-semi-transparent-caption
// 22-01-2012

$(document).ready(function() {      
     
    //Execute the slideShow
    slideShow();
 
});
 
function slideShow() {
 
    //Set the opacity of all images to 0
    $('#gallery a').css({opacity: 0.0});
     
    //Get the first image and display it (set it to full opacity)
    $('#gallery a:first').css({opacity: 1.0});
     
    //Set the caption background to semi-transparent
    $('#gallery .caption').css({opacity: 0.7});
 
    //Resize the width of the caption according to the image width
    $('#gallery .caption').css({width: $('#gallery a').find('img').css('width')});
     
    //Call the gallery function to run the slideshow, 6000 = change to next image after 6 seconds
    setInterval('gallery()',5000);
     
}
 
function gallery() {
     
    //if no IMGs have the show class, grab the first image
    var current = ($('#gallery a.show')?  $('#gallery a.show') : $('#gallery a: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().hasClass('caption'))? $('#gallery a:first') :current.next()) : $('#gallery a:first'));   
     
    //Get next image caption
    var caption = next.find('img').attr('rel'); 
     
    //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 current image
    current.animate({opacity: 0.0}, 1000)
    .removeClass('show');
         
}