Update Session State for only one item

Question

I have several hidden items (e.g. fund, object and unit) that hold values that are input parameters for a function that returns a SQL statement to a 'PL/SQL Function Body Returning SQL Query' region. These hidden items are set when a user selects a value from a pop-up tree. I want to dynamically set corresponding visible prompt text items (fund_prompt, object_prompt and unit_prompt) to a descriptive value that makes sense to the user. I've tried using a source type of SQL and placing the following SQL statement in the source
SELECT child_prompt
FROM fr_hierarchy_fund
WHERE child = :FUND;
When the value in one of the hidden items is changed, the visible prompt item displays "undefined" until the page is submitted.
Is there a way to set the session state of an item without submitting the page?
Thanks
David

Answer 1

David,
Items, hidden or not, are not set in session state until the page is submitted. You might consider submitting the page with a javascript event on your popups. The request value can be used to control what processing you do or don't do on page submission and a branch right back to the page should allow you to show everything based on current item values.
Scott