Levels?

Have searched but found nothing about levels in as3.

All display objects when created are created on a layer or level, right?
For example a loop which creates empty movie clips and then with the help of xml puts pictures in the empty movie clips. Then all the objects are on a seperate level or something like that. The last one created is at the top I think.

To make it simple. Can you alter the objects level in as3?

Sry if I’m not making any sense!