function slideshow() 
{
    var $active = $('.banner div.active');

    if ( $active.length == 0 ) $active = $('.banner div:last');
    
    var $sibs  = $active.siblings();
    var rndNum = Math.floor(Math.random() * $sibs.length );
    var $next  = $( $sibs[ rndNum ] );
    //var $next =  $active.next().length ? $active.next() : $('.banner div:first');
    $active.removeClass('active')
    $active.addClass('last-active');
    
    $next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, 1000, function() {
            $active.removeClass('active last-active');
        });
}

$(function() {
    if(document.getElementById('imageRotatorDelay') != null)
    {
        var delay=document.getElementById('imageRotatorDelay');
        setInterval( "slideshow()", delay.value );
    }
});