function Zeit() {
 var Jetzt = new Date();
 var Tag = Jetzt.getDate();
 var Monat = Jetzt.getMonth() + 1;
 var Jahr = Jetzt.getYear();
 var Uhrzeit = Jetzt.getTime()/ 1000;
 if(Jahr < 999) Jahr += 1900;{
 var Vortag  = ((Tag < 10) ? "0" : "");
 var Vormon  = ((Monat < 10) ? ".0" : ".");
 var Datum = Vortag + Tag + Vormon + Monat  + "." + Jahr;
}
return Datum;
}

datetoday = new Date();
thehour = datetoday.getHours();
if (thehour >19) display = "Abend";
else if (thehour >17) display = "Tag";
else if (thehour >13) display = "Nachmittag";
else if (thehour >12) display = "Mittag";
else if (thehour >10) display = "Tag";
else display = "Morgen";
var greeting = ("Guten " + display + "!");

var expDays = 30;
var exp = new Date(); 
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));

function Who(info){
var VisitorName = null
if (VisitorName == null) {
VisitorName = greeting;
}
return VisitorName;
}