How to update a current window

Hi everyone,

I work on a script palette, in which, I can select an XMl file, seeing is Nodes and items, and a dropdownlist in which I retrieve all the document paragraph styles.By the time I select a textFrame' and retrieve the applied paragraph style. My purpose is to put this result on my dropdownlist by updating my palette. That's my headache!

Please, help ?

Best regards

Américo