Flash MX 2004.
document.setElementProperty(property, value)
property A string that specifies the name of the Element property to set. For a complete list of properties and values, see the Property summary table for the Element object. You can’t use this method to set values for read-only properties, such as element.elementType, element.top, or element.left. value An integer that specifies the value to set in the specified Element property.
Nothing.
Method; sets the specified Element property on selected objects in the document. This method does nothing if there is no selection.
The following example sets the width of all selected objects to 100 and the height to 50:
fl.getDocumentDOM().setElementProperty("width", 100);
fl.getDocumentDOM().setElementProperty("height", 50);