function slideSwitch() {
	var $active = $('#slideshow img.active');
	var $span = $('h1 span');
		
	if ( $active.lenght == 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');
	});
	
	// change first line of h1 colour	
	if ($next.attr('src') == 'css/images/praia2.jpg') {
		$span.css('color', '#a7cad7');
	} else {
		$span.css('color', '#fff');
	}
}

$(function() {
setInterval("slideSwitch()", 4000);
});