RE: DDL wrong event called

hi all,
hi i have 4 dropdownlist. A selected index event will populate data for B ddl.
C selected index event will populate data for D ddl.
now i select data from A so, it'll hit the A selectedindex event then click the clear button to clear the data from B and set the selectdindex = 0 to A. using below code
$("#A_DDL").get(0).selectedIndex = 0;
            $("#B_DDL").val('');
            $('#B_DDL >option').remove();
            $("#B_DDL").append($("<option></option>").val("0").html("Select"));
then i select C ddl that time its first firing the A ddl SelectedIndex Change event. how to stop this issue?
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