editTemplate on row change error throw $inputFrom was not an function

[MuhammadAzhaan]

when i first load the grid and click on the row its works but after click on the second row $inputFrom.change function throw erorr i.e, $inputFrom was not an function, please suggest whats an issue?

editTemplate: function (value) { debugger; var $inputFrom = jsGrid.fields.timeField.prototype.editTemplate.call(this, value);
$inputFrom.change(function () { var selectedValue = $(this).val(); validFrom2 = selectedValue;
});
return $inputFrom; }

[MuhammadAzhaan]

The field on which i am applying the edittemplate is date calendar field.