Checking overlapping of 2 objects of different type. Please help

programming flash
1

Hi
I am trying to check if objects of 2 different type overlaps or not. I have a CameraStartDrag which is activated by on press of MovieClip. I have some container of type Sprite which contains UI Loader component. All i need is if user takes CameraStartDrag on top of UILoader, the CameraStartDrag’s index should come on top of UILoader. Currently CameraStartDrag is going back of UILoader. Attached is the code.
Please help me out as this problem is making me crazy.
Thanks

for (var j:Number=1; j<=16; j++)
{
var CameraStartDrag;

//Getting all the thumbnails by Name for dragging on stage
CameraStartDrag=getChildByName("Thumbnail_"+j);

}
CameraStartDrag.addEventListener(MouseEvent.MOUSE_DOWN,CamStartDragTN);
var container:Sprite=new Sprite();
function CamStartDragTN(event:MouseEvent):void
{
var CameraStartDrag=event.target;
CameraStartDrag.startDrag();
if(container.numChildren>0)
{
for (var z:Number=0; z<=container.numChildren-1; z++)
{
var Child:DisplayObject=container.getChildAt(z);
if(CameraStartDrag.hitTestObject(Child))
{
trace(“Object Hit”);
}
}
}