function greeting() {
Now = new Date()
Hour = Now.getHours();
if (Hour < 5)
msg ="Hello Dear, Can't sleep?"
else if(Hour <12)
msg ="Hi, Good Morning"
else if(Hour < 16)
msg ="Hi, Good Afternoon!"
else if (Hour < 23)
msg ="Hi, Good Evening"
return( msg )
}
document.write(greeting())