Get the registration point for an element on the Flash stage

get_registration_point.jsfl

function getRegistrationPoint(element) {
	var t = element.matrix;
	if (t.b == 0 && t.c == 0) {
		return { x: (element.x - element.left) / t.a, y: (element.y - element.top) / t.d };		
	}
	var doc = fl.getDocumentDOM();
	var previousSelection = doc.selection;
	doc.selection = [element];
	doc.enterEditMode();
	var reg = getRegistrationPoint(doc.selection[0]);
	doc.exitEditMode();
	doc.selection = previousSelection;
	return reg;
}