var d = new Date()
theHour=d.getHours()
switch (theHour)
{
	case 12: case 13: case 14: case 15: case 16:
		document.write("Good afternoon, ")
	break
	case 17: case 18: case 19: case 20: case 21: case 22: case 23: 
		document.write("Good evening, ")
	break
	default:
		document.write("Good morning, ")
}