What's the difference between a native array and a normal ?

I use the following code to retrieve ValueList values on an array

//Retrive values from ValueList in array in order to compare
var valuesA = application.getValueListArray('Politesse')
var nbrValues = valuesA.length

I see on debug that the value are in an array but I can not use the property lenght of the array that is equal 0.
I see also on the debugger that the array is valuesA org.mozilla.javascript.NativeArray@f49a18

How can I retrieve values on a normal array where I can use index ?

Thanks for your help.

DomTom.

use ```
application.getValueListItems(String valueListName)


this will give you a dataset. See databaseManager/JSDataSet what you can do with it...