Some times I feel that the value of item is not setting to it’s session state. we can not save the value to session state until unless we use submit the page with the item or submitting the page items as well.
Now try to set it without loading the page
let say we have an Item as “P1_DEPT”.
Create a …
You just need to choose a region named as region display selector in the breadcrumb of the apex page it will show all the regions , those are enabled for display in region display selector. And highlight that one which is on display.
must select scroll window option in region display selector attributes.