javascript - jquery reset load file back to default -

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i have 3 layer select use jquery load option sub-select

country->state->city

so if user select usa, 2nd select load usa's state. user can select city after select state.

ex. usa->ca->la

however if user select usa->ca->la first user want change country aus

it become aus->select state->la, 3rd select still stay same.

is way reset 2nd, 3rd select default if user change top select.

$("#country").change(function(){     switch($("#country").val()){         case "aus":$("#state").load("aus_state.php");break         case "uk":$("#state").load("uk_countie.php");break         case "usa":$("#state").load("us_state.php");break     } });

how remove load files default?


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