function setBgImage() { 
	var today = new Date();
	var month = today.getMonth(); 
	var season ="media/images/bg_seasonal/spring.jpg"; 
	var bgImage_val = document.getElementById("bgImage");
	
	if (month<=11) season ="media/images/bg_seasonal/autumn.jpg"; 
	if (month<=8) season ="media/images/bg_seasonal/summer.jpg"; 
	if (month<=5) season ="media/images/bg_seasonal/spring.jpg"; 
	if ((month<=2)||(month==12)) season ="media/images/bg_seasonal/snowBack.jpg"; 
	
	bgImage_val.src = season;
 }  

$(document).ready( function(){ 
	setBgImage();
});