I'm using APEX 18.2. I have page with many component, which reload the page when clicked. But, I need to do some specific action, when a select list (with submit) value is changed. How to handle the event when the Select list value changed. I tried to put a DA for value change, but that change is disappears when the page is loaded because of select list submit action. How to find the request is from the select list?. thanks for your help.