ActionScript for Flash MX: The Definitive Guide, 2nd Edition By Colin Moock
Chapter 18. ActionScript Language Reference
Button._url Property
Flash 6
the network address of the movie clip that contains the button
read-only
theButton._url
Description
The _url property represents the URL (Uniform Resource Locator) indicating the Internet or local disk location of theButton._parent, as a string. The _url property is always an absolute URL, such as "http://www.moock.org/asdg/examples/someMovie.swf", never a relative one. See MovieClip._url for details. Note that theButton._url is always the same as theButton._parent._url.
