[рони]

makalet,

<script>
  var birthday = '07.09.2005';
  var dd = birthday.split(".");
  var mydate = new Date(dd[2],dd[1]-1,dd[0]);
  var date = new Date();
  date.setHours(0, 0, 0);
  for (var i=0; ; i+=10)  {
  mydate.setYear(+dd[2]+i);
  var test = Math.round((mydate - date) / 864E5);
  if(test > 0) {document.write(i +" лет юбилей через " +test + " дней<br>"); break }
  }

</script>