how to get $(this) row when timepicker on hide

[dongon89]

when timepicker on hide, how to get this row input text element

example
a table display list of data , each row contain timepicker input box.
after select timepicker, then on hide ,during onhide it will checking validation, if validate failed, empty the timepicker input box.

i coded $(this).closest('tr').find("class_name").val(''); but it doesnt work