 			_verticalScrollBar.incrementalScrollDelta = _verticalScrollIncrement;
 			_verticalScrollBar.name = "vscrollbar_"+this.name;
 			_verticalScrollBar.width = 15;
-			_verticalScrollBar.addEventListener(MouseEvent.MOUSE_DOWN, function(event:MouseEvent):void{
-				mouseOverDisabled = true;
-			})
+			_verticalScrollBar.addEventListener(Event.ADDED_TO_STAGE, function():void{
+				_verticalScrollBar.addEventListener(MouseEvent.MOUSE_DOWN, function(event:MouseEvent):void{
+					mouseOverDisabled = true;
+				})
+				_verticalScrollBar.stage.addEventListener(MouseEvent.MOUSE_UP, function(event:MouseEvent):void{
+					mouseOverDisabled = false;
+				})
+			});
 			_verticalScrollBar.addEventListener(PyroEvent.SIZE_VALIDATED, onVerticalScrollBarSizeValidated);
 			_verticalScrollBar.addEventListener(PyroEvent.UPDATE_COMPLETE, onVScrollBarUpdateComplete);
-			_verticalScrollBar.addEventListener(MouseEvent.MOUSE_UP, function(event:MouseEvent):void{
-				mouseOverDisabled = false;
-			})
-			
 			_verticalScrollBar.skin = IScrollableContainerSkin(_skin).verticalScrollBarSkin;
 			_verticalScrollBar.addEventListener(ScrollEvent.SCROLL, onVerticalScroll)
 			_verticalScrollBar.doOnAdded()

	import org.openPyro.layout.AbsoluteLayout;
	import org.openPyro.layout.IContainerMeasurementHelper;
	import org.openPyro.layout.ILayout;
	
	import flash.display.DisplayObject;
	import flash.events.MouseEvent;
	import flash.geom.Rectangle;

	/**
	 * UIContainers extend UIControls and introduce

			_horizontalScrollBar.incrementalScrollDelta = _horizontalScrollIncrement
			_horizontalScrollBar.name = "hscrollbar_"+this.name;
			_horizontalScrollBar.height = 15;
			
			_horizontalScrollBar.addEventListener(Event.ADDED_TO_STAGE, function(event:Event):void{
				_horizontalScrollBar.addEventListener(MouseEvent.MOUSE_DOWN, function(event:MouseEvent):void{
					mouseOverDisabled = true;
				});
				_horizontalScrollBar.stage.addEventListener(MouseEvent.MOUSE_UP, function(event:MouseEvent):void{
					mouseOverDisabled = false;
				});			
			});
			
			_horizontalScrollBar.addEventListener(PyroEvent.SIZE_VALIDATED, onHorizontalScrollBarSizeValidated)
			_horizontalScrollBar.addEventListener(ScrollEvent.SCROLL, onHorizontalScroll);
			_horizontalScrollBar.parentContainer = this;
