<script type="text/javascript">
  
  // Requires jQuery UI - Core Modules from below.
  
  // Use: Re-name 'datepicker' to match form field ID.
  
  $(function() {
    $("#datepicker").datepicker
      ({
        minDate: 0,
        maxDate: "+3Y",
        numberOfMonths: 2,
        showButtonPanel: true});
    
    ({
      onClose: function()
      {
        // validate code
        validators[this.id].check();
        
      }
    });
  });
</script>