// JavaScript Document

rnd.today=new Date();
rnd.seed=rnd.today.getTime();

function rnd() {
		rnd.seed = (rnd.seed*9301+49297) % 233280;
		return rnd.seed/(233280.0);
};

function rand(number) {
		return Math.ceil(rnd()*number);
};
function setSeason() 
{
	var now = new Date();
	var month = now.getMonth() + 1;
	var date = now.getDate();
	var year = now.getYear();
	var season;
	if (month > 0 && month <= 3) season = "winter";
	if (month == 3 && date > 19) season = "spring";
	if (month > 3 && month <= 6) season = "spring";
	if (month == 6 && date > 20) season = "summer";
	if (month > 6 && month <= 9) season = "summer";
	if (month == 9 && date > 21) season = "fall";
	if (month > 9 && month <= 12) season = "fall";
	if (month == 12 && date > 1) season = "winter";
	return season;	
} 
function setImg()
{
	var imgNum = rand(4);
	var season = setSeason();		
	var photo = "/homeimages/" + season + "_" + imgNum + ".jpg";
	var m = document.getElementById("photo");
	m.src = photo;
}