Changing quality on scroll :: Scroll Plane

Hi There,

Does anyone know a easy way of getting the flash movie to change quality when a scroll plane is scrolling… I have loads of content in the plane and need to set the quality to low whilst scolling to improve performance…

at the moment I have this code.

var dragQual:Object = new Object();
dragQual.scroll = function(eventObj){
       _quality = "LOW"
}
tDragObject.addEventListener("scroll", dragQual);

but it only sets the quality to low, once the user has finnished scolling I want the quality to go back to best…

Any Ideas?