datetimepicker plugin

I am using this plugin datetimepicker which uses jquery ui. It gives this error in firebug

$.datepicker undefined
$.datepicker._base_selectDate = $.datepick开发者_开发技巧er._selectDate; jquery-ui-timepicker-addon.js (line 941)

---

create a version of jquery UI which includes the datepicker, and load that script on your page before the datetimepicker.