[jip]

не работает.
Функции не запускаются при смене переменной

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" applicationComplete="" layout="absolute" width="607" height="590" backgroundColor="#f7f7f7">
		<mx:Style source="flex_skins.css"/>
		<mx:Script>
 
    		import mx.controls.Alert;
		import mx.managers.PopUpManager;
 
		protected var _dataloading:int=0;
 
		public function plusvar():void{
			_dataloading--;
		}
		public function plusvar1():void{
			_dataloading++;
		}
 
 
		public function get dataloading ():int {
		return _dataloading;
			Alert.show("_dataloading: " + _dataloading);
		}
		public function set dataloading (value:int):void {
  			_dataloading=value;
	  		Alert.show("_dataloading: " + _dataloading);
		}
 
 
       </mx:Script>
		<mx:Button x="431" y="111" label="Button" click="plusvar();"/>
		<mx:Button x="431" y="151" label="Button" click="plusvar1();"/>
</mx:Application>