function setSeason () {
		var dToday = new Date();
		var nMonth = dToday.getMonth();
		var nY;
		
		if (nMonth >= 9) {
			nY = -258;
		} else if (nMonth >= 6) {
			nY = -172;
		} else if (nMonth >= 3) {
			nY = -86;
		} else if (nMonth >= 0) {
			nY = 0;
		}
		
		var pElement = document.getElementById("timeandgarden").style.backgroundPosition = "0px " + nY + "px";
}

window.onload = setSeason;