datetoday = new Date();
	timenow=datetoday.getTime();
	datetoday.setTime(timenow);
	thehour = datetoday.getHours();
	
	if (thehour >= 23) 
		display = "/user_data/packages/default/css/midnight.css";
	else if (thehour >= 19) 
		display = "/user_data/packages/default/css/night.css";
	else if (thehour >= 16) 
		display = "/user_data/packages/default/css/evening.css";
	else if (thehour >= 12) 
		display = "/user_data/packages/default/css/daytime.css";
	else if (thehour >= 7) 
		display = "/user_data/packages/default/css/morning.css";
	else if (thehour >= 4) 
		display = "/user_data/packages/default/css/earlymorning.css";
	else if (thehour >= 0) 
		display = "/user_data/packages/default/css/midnight.css";
	else 
		display = "/user_data/packages/default/css/evening.css";
	
	var css = '<';
	css+='link rel="stylesheet" href=' + display + ' \/';
	css+='>';
	
	document.write(css);


/*
ここでは、
・23時以降：midnight
・0時以降：midnight
・4時以降：earlymorning
・7時以降：morning
・12時以降：daytime
・16時以降：evening
・19時以降：night
・時間帯が不明な場合：evening
となります。
*/