How to add iPad scroll bar functionality in flex4

[TABLE]
[TR=“bgcolor: transparent”]
[TD=“class: votecell, bgcolor: transparent”][/TD]
[TD=“class: postcell, bgcolor: transparent”]i am prepairing a flex AIR application which is a touch screen application. and i want to just add the iphone/ipad scroller functionality in my application i.e when we swipe down the content the scrollbar is also go down and when we swipe up the content the scrollbar is go up means both will need to move in a same direction.
Thanks in advance.

[/TD]
[/TR]
[/TABLE]