javascript - Populate third select element depending on option from second select that has been populated from first select option, using ajax -

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so, have working code got site [mitrajit's tech blog][1][1]: http://www.mitrajit.com/populate-dropdown-list-based-selection-another-dropdown-list-using-ajax/

now, after populating second select element, i'd populate third element basing on options second populated select element. i'm trying reuse same code it's not working. ideas on how go it?


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