/* 星にコンテンツ名を重ねる*/

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeimages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeimages.arguments.length; i+=2) {
			document[changeimages.arguments[i]].src = changeimages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadimages() {
	if (document.images) {
		atmes_aq = newImage("images/atmes_aq.gif");	
		atmes_cg = newImage("images/atmes_cg.gif");
		atmes_dc = newImage("images/atmes_dc.gif");
		atmes_de = newImage("images/atmes_de.gif");
		atmes_dr = newImage("images/atmes_dr.gif");
		atmes_ex = newImage("images/atmes_ex.gif");
		atmes_fa = newImage("images/atmes_fa.gif");
		atmes_ma = newImage("images/atmes_ma.gif");
		atmes_mg = newImage("images/atmes_mg.gif");
		preloadFlag = true;
	}
}

/* アトリウム画像を変える*/

dd = new Date();
hour = dd.getHours();
mon = dd.getMonth() + 1; 
date = dd.getDate(); 

/* 自動季節アトリウム*/

if ((mon == 12) && (date < 26)) {
		folder = "xmas";
	} else if ((mon == 1) && (date < 4)) {
		folder = "newyear";
	} else if ((mon == 3) && (date > 14)) {
		folder = "sakura";
	} else if ((mon == 7) && (date > 8)) {
		folder = "tanabata";
	} else {
		folder = "org";
}

/* 時間帯により画像を変える*/

if (hour < 5) {
   atrtime = "_n";
} else if (hour < 6) {
   atrtime = "_m";
} else if (hour < 12) {
   atrtime = "_d";
} else if (hour < 17) {
   atrtime = "_b";
} else if (hour < 19) {
   atrtime = "_e";
} else if (hour < 21) {
   atrtime = "_t";
} else {
   atrtime = "_n";
}

/* アトリウム画像表示*/

function atTitle(){
document.write("<img src='images/atr_logo" + atrtime + ".gif' height='110' width='390' border='0'>");
}

function atImg(){
document.write("<img src='images/atr" + atrtime + ".jpg' usemap='#atrium' height='305' width='660' border='0' alt='atrium'>");
}