Datepicker combine functions

Hi Guys,
can I combine these two scripts. THe problem that i have, when i put the first function in my functions.php, the choice for Month and Years is deactivate.
And when i place the second script in the php then it dosen't works.

<script type="text/javascript">
jQuery(document).ready(function($) {
    $(".datepicker").datepicker({ maxDate: 0 });
});
</script>

<script>
  $(function() {
    $( "#datepicker" ).datepicker({
      changeMonth: true,
      changeYear: true
    });
  });
  </script>

Thanks!