function y2k(number)    { return (number < 1000) ? number + 1900 : number; }

Stamp = new Date();

var day   = Stamp.getDate();
var month = Stamp.getMonth() + 1;
var year  = y2k(Stamp.getYear());

var Hours = Stamp.getHours();
var Mins = Stamp.getMinutes();
var Time = "";

if (Hours >= 12) { Time = " pm"; } else { Time = " am"; }
if (Hours > 12) { Hours -= 12; }
if (Hours == 0) { Hours = 12; }
if (Mins < 10) { Mins = "0" + Mins; }

document.write(day + "." + month + "." + year + " " + Hours + ":" + Mins + Time);