//背景画像置換の為のlink要素記述A
function getCSSA() {
	datetoday = new Date();
	timenow=datetoday.getTime();
	datetoday.setTime(timenow);
	thehour = datetoday.getHours();

	if (thehour > 18)
	display = "night_img.css";
	else if (thehour > 15)
	display = "evening_img.css";
	else if (thehour > 4)
	display = "noon_img.css";
	else
	display = "night_img.css";

	var css = '<';
	css += 'link rel="stylesheet" href="css\/' + display + '" \/';
	css += '>';

	document.write(css);
}

//背景画像置換の為のlink要素記述B
function getCSSB() {
	datetoday = new Date();
	timenow=datetoday.getTime();
	datetoday.setTime(timenow);
	thehour = datetoday.getHours();

	if (thehour > 18)
	display = "night_img.css";
	else if (thehour > 15)
	display = "evening_img.css";
	else if (thehour > 4)
	display = "noon_img.css";
	else
	display = "night_img.css";

	var css = '<';
	css += 'link rel="stylesheet" href="..\/css\/' + display + '" \/';
	css += '>';

	document.write(css);
}