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: 1.0}, 1000, function() {
			$active.removeClass('active last-active');
		});
}
$(function() {
	setInterval( "slideSwitch()", 6000 );
});

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

$(function () {
        $('#backTop').click(function () {
            $(this).blur();

            $('html,body').animate({ scrollTop: 0 }, 'slow');

            return false;
        });
});