function slideThrough($transitiontime) {
    var $aktiv = $('#slideshowbox img.aktiv');
    if ( $aktiv.length == 0 ) $aktiv = $('#slideshowbox img:last');
    var $next =  $aktiv.next().length ? $aktiv.next():$('#slideshowbox img:first');
    $aktiv.animate({opacity : 0.0}, $transitiontime);
    $next.css({opacity: 0.0}).addClass('aktiv').animate({opacity: 1.0}, $transitiontime, function() {$aktiv.removeClass('aktiv');});
}
function startShow($pausetime, $transitiontime) {
	var $aktiv = $('#slideshowbox img.aktiv');
    if ( $aktiv.length == 0 ) $('#slideshowbox img:first').addClass('aktiv');
    var show = self.setInterval("slideThrough(" + $transitiontime + ")", $pausetime);
}