ActionScript for Flash MX: The Definitive Guide, 2nd Edition By Colin Moock
Chapter 18. ActionScript Language Reference
Button._target Property
Flash 6
the target path of the button, in slash syntax
read/write
theButton._target
Description
The _target property represents the path to theButton in a Flash 4-style slash notation string. For example, if go_btn resides on the main movie timeline, go_btn's _target property is "/go_btn". To retrieve a string that gives the path to a button in dot notation, use the global targetPath( ) function. Because slash notation is deprecated, this property is not commonly used and is supported only for consistency with the legacy MovieClip._target property.