var Digital=new Date();
var hours=Digital.getHours();
var minutes=Digital.getMinutes();
var seconds=Digital.getSeconds();
var dn=" 上午好！";
if (hours<6)
	dn="&nbsp;凌晨好！";
else if (hours<11)
	dn="&nbsp;上午好！";
else if (hours<13)
	dn="&nbsp;中午好！";
else if (hours<18)
	dn="&nbsp;下午好！";
else
	dn="&nbsp;晚上好！";
document.write(dn);