How work with jQueryUI Datepicker?

How work with jQueryUI Datepicker?

Hello!

Can you give me example how react on user click on datepicker? For example, i have inlined datepicker and want to show alert with selected date.

If i write code like that:
  1. $(function() {
  2.  $("#datepicker").datepicker({maxDate: "Today"});
  3.  $.datepicker.formatDate('ddmmyy'); 
  4. $.datepicker.setDefaults($.datepicker.regional['ru']);
  5.  $('.selector').datepicker({
  6.  onSelect: function(dateText, inst) 
  7. { 
  8. alert(dateText); 
  9. }
  10.  }); 
  11. }); 
Nothing happens!

Please, give me example of working code!