function lastUpdateDate () {
  
  //  document.lastModified 
  var lastModDate = new Date(Date.parse(document.lastModified));
  
  // valid date?
  if (lastModDate != 0) {
        var year = lastModDate.getFullYear();
        var month = lastModDate.getMonth()+1;
        var date = lastModDate.getDate();
 
        if (date<10) date = "0"+date;
        if (month<10) month = "0"+month;
      
    // Display date document was last updated.
    document.write("Last update: "+date+"."+month+"."+year);
  }
}