I am using Jquery datetimepicker(js/timepicker.js) and getting error "datepicker._defaults' is null or not an object" in extend method of following javascript file
Error comes when loading timepicker.js file.'datepicker' object is undefined in javascript file.
===================timepicker.js===============
/**
* Extending default values
*/
$.extend($.datepicker._defaults, {
'stepMinutes': 1, // Number of minutes to step up/down
'stepHours': 1, // Number of hours to step up/down
'time24h': false, // True if 24h time
'showTime': false, // Show timepicker with datepicker
'altTimeField': '' // Selector for an alternate field to store time into
});