Date.prototype.getDateString = function(str) {
  var dnames = ['Sunday', 'Monday', 'Tuesday', 'Wednesday',
      'Thursday', 'Friday', 'Saturday', 'Sunday'];
  var mnames = ['January', 'February', 'March', 'April',
      'May', 'June', 'July', 'August', 'September',
      'October', 'Novemeber', 'December'];
	  
  str = str.replace('%day', dnames[this.getDay()]);
  str = str.replace('%date', this.getDate());
  str = str.replace('%ordinal', this.getDateOrdinal());
  str = str.replace('%month', mnames[this.getMonth()]);
  str = str.replace('%year', this.getFullYear());
  return str;
};

Date.prototype.getDateOrdinal = function() {
  var n = this.getDate();
  var ord = 'th';
  if (n % 10 == 1 && n % 100 != 11) {
    ord = 'st';
  } else if (n % 10 == 2 && n % 100 != 12) {
    ord = 'nd';
  } else if (n % 10 == 3 && n % 100 != 13) {
    ord = 'rd';
  }

  return ord;
};

Date.prototype.getISODate = function() {
  var mth = this.getMonth() + 1;
  mth = (mth < 10 ? '0' : '') + mth;
  var date = this.getDate();
  date = (date < 10 ? '0' : '') + date;
  return this.getFullYear() + mth + date;
};

function writeDate() {
	var now = new Date();
	var lastModified = document.getElementById("lm");
	if (now.getDate() < 15) {
		lastModified.innerHTML = "Last Modified 1."+(now.getMonth()+1)+now.getDateString(".%year");
	} else {
		lastModified.innerHTML = "Last Modified 15."+(now.getMonth()+1)+now.getDateString(".%year");
	}
}
window.onload = writeDate;