var refreshInterval = 4000;


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

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

    //Call the page_image function to run the slideshow, 6000 = change to next image after 6 seconds
    setInterval('rotate()', refreshInterval);

}

function rotate() {


    //Get the first image
    var current = ($('ul#picture_list li.show') ? $('ul#picture_list li.show') : $('ul#picture_list li:first'));
    //alert(current.attr('id'));

    var img = current.children(":first");
    //alert(img.attr('id'));
    //alert(img.attr('src'));

    //$('#main').css('background', img.attr('src'));
    $('#main').css('background-image', 'url("' + img.attr('src') + '")');

    //Get next image, when it reaches the end, rotate it back to the first image
    var next = ((current.next().length) ? ((current.next().hasClass('show')) ? $('ul#picture_list li:first') : current.next()) : $('ul#picture_list li:first'));

    //Set the fade in effect for the next image, the 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');


    //Un-comment the 3 lines below to get the images in random order

    var sibs = current.siblings();
    var rndNum = Math.floor(Math.random() * sibs.length);
    var next = $(sibs[rndNum]);


    //Set the fade in effect for the next image, the 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');

};


function initSlide() {

    var current = $('ul#picture_list li:first');

    var sibs = current.siblings();
    var rndNum = Math.floor(Math.random() * sibs.length);
    var next = $(sibs[rndNum]);

    var img = next.children(":first");
    $('#main').css('background-image', 'url("' + img.attr('src') + '")');

}


$(document).ready(function() {
    //Load the slideshow
    initSlide();
    theRotator();

});