function slideSwitch() {
		var $active = jQuery('#slideshow_ref IMG.active');
	
		if ( $active.length == 0 ) $active = jQuery('#slideshow_ref IMG:last');
	
		var $next =  $active.next().length ? $active.next()
			: jQuery('#slideshow_ref IMG:first');

		$active.addClass('last-active');
	
		$next.css({opacity: 0.0})
			.addClass('active')
			.animate({opacity: 1.0}, 1000, function() {
				$active.removeClass('active last-active');
			});
			
}

jQuery(function() {
    setInterval( "slideSwitch()", 5000 );
});