Date.prototype.getActualMonth = getActualMonth;
Date.prototype.getActualDay = getActualDay;
Date.prototype.getCalendarDay = getCalendarDay;
Date.prototype.getCalendarMonth = getCalendarMonth;

function getActualMonth() {
  var n = this.getMonth();
  n += 1;
  return n;
}

function getActualDay() {
  var n = this.getDay();
  n += 1;
  return n;
}

function getCalendarDay(dateToday) {
  var n = dateToday.getDay();
  var dow = new Array(7);
  dow[0] = "Sun";
  dow[1] = "Mon";
  dow[2] = "Tue";
  dow[3] = "Wed";
  dow[4] = "Thu";
  dow[5] = "Fri";
  dow[6] = "Sat";
  return dow[n];
}

function getCalendarMonth(dateToday) {
  var n = dateToday.getMonth();
  var moy = new Array(12);
  moy[0] = "Jan";
  moy[1] = "Feb";
  moy[2] = "Mar";
  moy[3] = "Apr";
  moy[4] = "May";
  moy[5] = "Jun";
  moy[6] = "Jul";
  moy[7] = "Aug";
  moy[8] = "Sep";
  moy[9] = "Oct";
  moy[10] = "Nov";
  moy[11] = "Dec";
  return moy[n];
}

function showDateString() {
  var today = new Date();
  var strg = getCalendarDay(today)
  strg = strg + " ";
  strg = strg + (today.getDate() <10 ? "0" : "") + today.getDate();
  strg = strg + " ";
  strg = strg + today.getCalendarMonth(today);
  strg = strg + " ";
  strg = strg + (today.getHours() <10 ? "0" : "") + today.getHours();
  strg = strg + ":";
  strg = strg + (today.getMinutes() <10 ? "0" : "") + today.getMinutes();
  
  document.write(strg);
}