function goBack() {
		currentCarouselNumber = currentCarouselNumber - 1;
		if (currentCarouselNumber < 0) currentCarouselNumber = numberOfItemsInTheCarousel - 1;
		updateCarousel();
	}
	
	function goForward() {
		currentCarouselNumber = currentCarouselNumber + 1;
		if (currentCarouselNumber == numberOfItemsInTheCarousel) currentCarouselNumber = 0;
		updateCarousel();
	}

	function updateCarousel() {
		document.getElementById('bannerSizeSelector').innerHTML = "<a href='banners.php?bannerSize=" + carousel[currentCarouselNumber] + "'><img src='downloads/banners/" + carousel[currentCarouselNumber] + "/sample.gif' class='bannerWrapper' /></a>";
	}