AS3基础实例–判断操作系统

package CB_3{import flash.display.Sprite;import flash.system.Capabilities;public class ExpA extends Sprite{private var _os:String;public function ExpA(){checkOs();}public function checkOs():String{_os = Capabilities.os.substr(0, 3);if (_os == "Mac"){trace("Mac");}else if (_os== "Win"){trace("Win");}else{trace("Other");}return _os;}}}