<?xml version="1.0" encoding="utf-8"?>
<mx:CheckBox xmlns:mx="http://www.adobe.com/2006/mxml"
	change="{change()}" initialize="init()">
	<mx:Script>
		<![CDATA[
			import mx.binding.utils.BindingUtils;
						
			private var _list:XMLList;			
			private var _item:XML;
			 
			public function set list(newList:XMLList):void {
				_list = newList;
				setSelected();
			}
			 
			public function set item(newItem:XML):void {
				_item = newItem;
				setSelected()
			}
			 
			private function change():void {
				if(selected) {
			 		_list[0].appendChild(_item.copy());
				} else {			 		
					delete _list.elements(_item.localName()).(toString() == _item.toString())[0];
				}
				setSelected();
			}
			 
			private function setSelected():void {
				if(_list != null && _item != null) {
					var items:XMLList = _list.elements(_item.localName()).(toString() ==
						_item.toString());
					selected = _list.elements(_item.localName()).(toString() ==
						_item.toString()).length() > 0;
				}
			}
			 
			private function init():void {				
				setSelected();
			}
		]]>
	</mx:Script>
</mx:CheckBox>