[flexcoders] May I click a button to ScrollDown in TileList

[flexawesome]

Hi there,

I am using TileList to build my simple application, is there a way to 
click a button to scroll down in TileList component?

I would like to set vercitalScrollPolicy="off" and then add a new 
button on the stage, user can click the button to scroll down in 
TileList.

Thanks