datetoday = new Date();
timenow=datetoday.getTime();
datetoday.setTime(timenow);
thehour = datetoday.getHours();

if (thehour >= 21) 
	display = "CSS/sougi/night.css";
else if (thehour >= 6) 
	display = "CSS/sougi/noon.css";
else if (thehour >= 0) 
	 display = "CSS/sougi/night.css";
else 
	display = "CSS/sougi/noon.css";

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

document.write(css);