function slideSwitch() {
             var $active = $('#slideshow img.active');
             if ( $active.length == 0 ) $active = $('#slideshow img:last');
             var $next =  $active.next().length ? $active.next() : $('#slideshow img:first');
             $active.addClass('last-active');
             $next.css({opacity: 0.0})
                 .addClass('active')
                 .animate({opacity: 3.0}, 3000, function() {
                     $active.removeClass('active last-active');
               });
}
$(function() {
             setInterval( "slideSwitch()", 4500 );
});