My guess would be that it uses a vertical sidebar list created on page 0 and has conditions stating which page it will be displayed on but without looking in application builder its difficult to give an exact answer.
I would try this as a first attempt and see if it meets your needs.
Thanks for the quick reply
You are right and the list is coming from the page 0 in the oracle example URL.
But when I click on list on my test application, entire page is refreshing.. But same in the Oracle Link, it is refreshing only chart region between pages.
I guess we need to include some java code for the same.
Please share if any useful code for the same.