function Greet() {
 //Time-related greeting
 var d=new Date()
 var hour=d.getHours()
 if (hour<7) {
  document.write("<p>Hello.  By the way, it's late - shouldn't you be in bed?</p>") }
 else
  if (hour<12) {
   document.write("<p>Good morning.</p>") }
  else
   if (hour<18) {
    document.write("<p>Good afternoon.</p>") }
   else {
    document.write("<p>Good evening.</p>") }
}