Hello Forum, I have an issue in Moving items between Two multi select dropdown b

Hello Forum, I have an issue in Moving items between Two multi select dropdown boxes.

1. Data getting populated from DB
2. Upon "Selecting single List Item" the selected item should move to the adjacent multi select drop down
3. Upon Clicking "Add All" all the item should move to the adjacent dropdown box.
4. Same for Vice Versa on Remove function is the requirement.

Attached the code. Pls advise if am missing something.

Thanks,
Deepan

Multiselect.txt

OriginalPostID-146624

OriginalPostID-146624