Flash MX 2004.
timeline.setLayerProperty(property, value [, layersToChange])
property A string that specifies the property to set. For a list of properties, see "Layer object". value The value to which you want to set the property. Use the same type of value you would use when setting the property in the layer object. layersToChange A string that identifies which layers should be modified. Acceptable values are "selected", "all", and "others". The default value is "selected" if you omit this parameter. This parameter is optional.
Nothing.
Method; sets the specified property on all the selected layers to a specified value.
The following example makes the selected layer(s) invisible:
fl.getDocumentDOM().getTimeline().setLayerProperty("visible", false);The following example sets the name of the selected layer(s) to selLayer:
fl.getDocumentDOM().getTimeline().setLayerProperty("name", "selLayer");