document.write()
day = new Date()
hr = day.getHours()

if ((hr ==1) || (hr ==2) || (hr ==3))
document.write("Hi there, Night Owl!")

if ((hr ==4) || (hr ==5) || (hr ==6))
document.write("Greet the Dawn")

if ((hr ==7) || (hr ==8) || (hr == 9) || (hr ==10) || (hr ==11))
document.write("Good Morning!")

if ((hr ==12) || (hr==13) || (hr==14) || (hr==15) || (hr==16))
document.write("Good Afternoon!")

if ((hr==17) || (hr==18) || (hr==19) || (hr==20) || (hr==21) || (hr==22) || (hr==23))
document.write("Good Evening!")

if (hr==0)
document.write("The Witching Hour")

document.write("</center>")