Flash MX 2004.
element.top
Read-only property; top side of the element. The value of element.top is relative to the upper left of the Stage for elements that are in a scene and is relative to the symbol’s registration point if the element is stored within a symbol. Use document.setSelectionBounds() or document.moveSelectionBy() to set this property.
The following example shows how the value of this property changes when an element is moved:
// Select an element on the Stage and then run this script.
var sel = fl.getDocumentDOM().selection[0];
fl.trace("Top (before) = " + sel.top);
fl.getDocumentDOM().moveSelectionBy({x:0, y:100});
fl.trace("Top (after) = " + sel.top);See the element.elementType example.