$(document).ready(function() { 
$('#impressionen').after('<ul id="slidenav">').cycle({
    fx:     'fade',
    speed:  'fast',
    timeout: 6000,
	slideExpr:'.slideshow_img',
    pager:  '#slidenav',
    next:   '#next', 
    prev:   '#prev',
    pagerAnchorBuilder: function(idx, slide) {
		var src = $('img',slide).attr('src');
        return '<li><a href="#"><img src="' + src + '"  height="40" /></a></li>';
    }
});
});