How to check that concrete object is on the scene?

Question

Hi
I wonder how can i check that concrete object is on the scene for example:
var sprite1:Sprite = new SPrite();
stage.addChild(sprite1);
if(?????)
    //do something with sprite1
else
     //add sprite1 to display list and do something with it
Is there any property or method to check this?

Answer 1

If you mean that the object exists, you can try...
if(sprite1)
    trace("it exists");
else
     trace("it's not here");
otherwise, if you mean you want to know if it's on the display list, you need to go thru the display list to see if it's in there...
var child:DisplayObject;
var spriteFound:Boolean = false;
for (var i:uint=0; i < stage.numChildren; i++)
child = stage.getChildAt(i);
if(child == sprite1){
   spriteFound = true;
if(spriteFound){
trace("it's on display list");
} else {
trace("it's not here");