var cssnumber = Math.floor(Math.random()*5+1);  
	if (cssnumber == 1)
		display = "css/bg1.css";
	else if (cssnumber == 2)
		display = "css/bg2.css";
	else if (cssnumber == 3)
		display = "css/bg3.css";
	else if (cssnumber == 4)
		display = "css/bg4.css";
	else if (cssnumber == 5)
		display = "css/bg5.css";
	else
		display = "css/bgNone.css"; 
	
	var css = '<'; 
	css+='link rel="stylesheet" href=' + display + ' \/'; 
	css+='>'; 
document.write(css);