var afterbluesPhotosQuantity = 10

afterbluesBanner = function() {
    image_no = Math.round(Math.random() * afterbluesPhotosQuantity + 1);
    $('#banner').animate({opacity: 'toggle'}, 1500, function() {
        $('#banner').attr("src", '/afterblues/' + image_no + '.jpg');
        $('#banner').animate({opacity: 'toggle'}, 1500, function(){
            setTimeout("afterbluesBanner()",7000);
        })
    });
}
$(function() {
    image_no = Math.round(Math.random() * afterbluesPhotosQuantity + 1);
    $('#banner').attr("src", '/afterblues/' + image_no + '.jpg');
    setTimeout("afterbluesBanner()", 7000);
});