function stars(number) {
	if (number == null || number < 0 || number > 5) {
		return;
	}
	
	document.write('<div class="stars">');
	for (i = 0; i < number; i++) {
		document.write('<img class="star" src="/media/star.png" alt="*" width="14" height="14"/>');
	}
	document.write('</div>');
}