      *  @playerversion AIR 1.5
      *  @productversion Flex 4
      */
-    public var decrementButton:FxButton;
+    public var decrementButton:Button;
     
     [SkinPart(required="false")]
     

[Style(name="symbolColor", type="uint", format="Color", inherit="yes")]

/**
 *  The FxScrollBar class helps to position
 *  the portion of data that is displayed when there is too much data
 *  to fit in a display area. 
 *  The FxScrollBar class displays a pair of scrollbars and a viewport. 
 *  A viewport is a UIComponent that implements IViewport, such as Group.
 *  
 *  <p>This control extends the FxTrackBase class and
 *  is the base class for the FxHScrollBar and FxVScrollBar
 *  controls.</p> 
 * 
 *  <p>A scroll bar consists of a track, a variable-size scroll thumb, and 
 *  two optional arrow buttons. The FxScrollBar class uses four parameters 
 *  to calculate its display state:</p>
 *
 *  <ul>

import flash.events.TimerEvent;
import flash.geom.Point;
import flash.utils.Timer;
import spark.components.Button;
import spark.core.IViewport;
import mx.events.PropertyChangeEvent;
import mx.events.ResizeEvent;

