getCSS()

function getCSS()
{
datetoday = new Date();
timenow=datetoday.getTime();
datetoday.setTime(timenow);
thehour = datetoday.getSeconds();
if (thehour > 49) display = "./css/menu06.css";
else if (thehour > 39) display = "css/menu05.css";
else if (thehour > 29) display = "css/menu04.css";
else if (thehour > 19) display = "css/menu03.css";
else if (thehour > 9) display = "css/menu02.css";
else if (thehour > 0) display = "css/menu01.css";
else display = "css/menu01.css";
var css = '<';  css+='link rel="stylesheet" id="BGchange"  href=' + display + ' \/';css+='>';
document.write(css);
}

setInterval(changeCSS, 10000);

function changeCSS(){
	dateObj = new Date();
	var checkS = dateObj.getSeconds();

	if(checkS >=50 ){ document.getElementById('BGchange').href = "./css/menu06.css";}
	else if(checkS < 50 && checkS >=40){ document.getElementById('BGchange').href = "./css/menu05.css";}
	else if(checkS < 40 && checkS >=30){ document.getElementById('BGchange').href = "./css/menu04.css";}
	else if(checkS < 30 && checkS >=20){ document.getElementById('BGchange').href = "./css/menu03.css";}
	else if(checkS < 20 && checkS >=10){ document.getElementById('BGchange').href = "./css/menu02.css";}
	else if(checkS >=0 && checkS <10) { document.getElementById('BGchange').href = "./css/menu01.css";}
}