<!-- Begin

datetoday = new Date();
timenow=datetoday.getTime();
datetoday.setTime(timenow);
thehour = datetoday.getHours();
if (thehour > 20) display = "Boa noite ";
else if (thehour >12) display = "Boa tarde ";
else display = "Bom dia ";
var greeting = (". " + display + "");
document.write(greeting);

// End -->