$(function() {
		   
// set opacity to nill on page load
$("#search button span").animate({
	opacity: 0
});

// on mouse over
$("#search button").hover(function () {
// animate opacity to full
	$("#search button span").stop().animate({
		opacity: 1
		}, 250 );
	},

// on mouse out
function () {
	// animate opacity to nill
	$("#search button span").stop().animate({
		opacity: 0
		}, 500 );
	});

});