Error on onchange Event

[oli]

Hi,

I need to change the value of a select field dependent of the value of another select field.
I have the field "auf_ang_status". If this field is going to be changed to "cancelled" I want to change the value in the select field "auf_status" to "cancelled" as well.
Therefore I created an onchange Event on the Costum Code (field: auf_ang_status) with following content:

Code: Select all

if($(this).val() == 'cancelled'){
    $('#auf_status').val($(this).val()).change();    
    alert('Your Order will be cancelled!');
}

1st step is working: The value in field #2 will be also changed to "cancelled" but the alert box is not visible and I got following error in my console:

Code: Select all

jquery.js?ts=20210527154022:2 Uncaught RangeError: Maximum call stack size exceeded
    at S.fn.init.val (jquery.js?ts=20210527154022:2)
    at nuFormObject.calc (nuformclass.js?ts=20210527154022:591)
    at nuTotal (nuform.js?ts=20210527154022:3915)
    at eval (eval at <anonymous> (nuform.js?ts=20210527154022:3454), <anonymous>:1:9)
    at HTMLInputElement.<anonymous> (nuform.js?ts=20210527154022:3454)
    at Function.each (jquery.js?ts=20210527154022:2)
    at S.fn.init.each (jquery.js?ts=20210527154022:2)
    at nuCalculateForm (nuform.js?ts=20210527154022:3445)
    at nuChange (nuform.js?ts=20210527154022:3352)
    at HTMLSelectElement.onchange (index.php?i=0&opener=16221300228331002:1)

Any ideas what I am doing wrong here?

Thanks and br,
Oli