var snow_opac=100;

function hideSnow() {
	var snow = document.getElementById("snow");
	if (snow_opac > 0) {
		snow_opac -= 5;
		snow.style.filter = "alpha(opacity=" + snow_opac + ")";
		snow.style.opacity = snow_opac/100.0;
		setTimeout("hideSnow()", 50);
	}
	else {
		snow.style.display="none";
	}
}