function getCSS(){
 datetoday = new Date();
 mmMonth = datetoday.getMonth();
 thehour = datetoday.getHours();
switch(mmMonth){
	case 0:
		nit = 18;
		eve = 16;
		mor = 7;
	break;

	case 1:
		nit = 18;
		eve = 16;
		mor = 7;
	break;

	case 2:
		nit = 19;
		eve = 16;
		mor = 6;
	break;

	case 3:
		nit = 19;
		eve = 16;
		mor = 6;
	break;

	case 4:
		nit = 19;
		eve = 17;
		mor = 6;
	break;

	case 5:
		nit = 19;
		eve = 17;
		mor = 6;
	break;

	case 6:
		nit = 20;
		eve = 18;
		mor = 5;
	break;

	case 7:
		nit = 20;
		eve = 18;
		mor = 5;
	break;

	case 8:
		nit = 20;
		eve = 18;
		mor = 6;
	break;

	case 9:
		nit = 19;
		eve = 17;
		mor = 6;
	break;

	case 10:
		nit = 19;
		eve = 17;
		mor = 6;
	break;

	case 11:
		nit = 18;
		eve = 16;
		mor = 7;
	break;

	default:
		nit = 19;
		eve = 16;
		mor = 6;
}

if (thehour >= nit)
document.write("<link rel='stylesheet' href='/css/night.css' type='text/css'>");
else if (thehour >= eve)
document.write("<link rel='stylesheet' href='/css/evening.css' type='text/css'>");
else if (thehour >= mor)
document.write("<link rel='stylesheet' href='/css/morning.css' type='text/css'>");
else
document.write("<link rel='stylesheet' href='/css/night.css' type='text/css'>");
}