An easy form to count days

  <form action="#">
  beginning&nbsp;&nbsp;
    <input id="hd" class="d" value="dd" />-
    <input id="hm" class="m" value="mm" />-
    <input id="ha" class="a" value="aaaa" />
  <br /><br />
  end&nbsp;&nbsp;
    <input id="td" class="dd" value="dd" />-
    <input id="tm" class="mm" value="md" />-
    <input id="ta" class="aa" value="aaaa" />
  <br /><br />
    <input type="button" value="count days!" onclick="mcd();" />
  </form>

<script type="text/javascript">
function mcd(){
  hd=Number(document.getElementById('hd').value);
  hm=Number(document.getElementById('hm').value)+1;
  ha=Number(document.getElementById('ha').value);
  var h=new Date();
  h.setFullYear(ha,hm,hd);
  td=Number(document.getElementById('td').value);
  tm=Number(document.getElementById('tm').value)+1;
  ta=Number(document.getElementById('ta').value);
  var t=new Date();
  t.setFullYear(ta,tm,td);
  ms = t.getTime()-h.getTime();
  s = ms/1000;
  m = s/60;
  h = m/60;
  d = h/24;
  days = Math.ceil(d);
  alert(days);
}
</script>