Can we make work notes filed mandatory when updating Time Worked field

[abusaleh_quader]

Hi 

I want to make Work Notes field mandatory if there any changes in Time worked field. I have tried this onchange client script but it is not working. Here I made field name as Time Worked.

function onChange(control, oldValue, newValue, isLoading, isTemplate) {

   if (isLoading || newValue === '') {

      return;

   }

   //Type appropriate comment here, and begin script below

   g_form.setMandatory('work_notes', true);

}

#Screenshot

[Bert_c1]

Here's a BR, A client script doesn't work for that field.  My BR is defined on a custom child table of task.

Not the best user experience, since the field is a Timer. And a test of the BR indicates the 'time_worked' field must be present on the form.