$(function() {
	// set opacity to nill on page load
	$("ul#menu span").css("opacity","0");

	$("ul#menu span").hover(
		// on mouse over : animate opacity to full
		function () {
			$(this).stop().animate({
				opacity: 1
			}, 'slow');
		},
		// on mouse out : animate opacity to nill
		function () {
			$(this).stop().animate({
				opacity: 0
			}, 'slow');
		}
	);
});