$(function() {
  $.datepicker.setDefaults({    
    showOn: 'both',    
    buttonImage: 'http://www.wagame.tw/JavaScript/jQuery/ui/datepicker/calendar.gif',    
    buttonImageOnly: true,    
    changeMonth: true,
	changeYear: true,
    showButtonPanel: true,
    buttonText: 'Calendar'    
  });
});