function slideSwitch() {
	var $active = $j('#slideshow img.active');
	if ( $active.length == 0 ) $active = $j('#slideshow img:last');
	var $next =  $active.next().length ? $active.next() : $j('#slideshow img:first');
	$active.addClass('last-active');
	$next.css({opacity: 0.0})
		.addClass('active')
		.animate({opacity: 1.0}, 1000, function() {
			$active.removeClass('active last-active');
		});
}
$j(function() {
	setInterval( "slideSwitch()", 6000 );
});

function clickTopBtn(i){
	var elem = $j(i); 
	var $active = $j('#slideshow img.active');
	elem.removeClass('active last-active');
}