      * 
      *  <p>In components where the content does not reflow, like a typical List's
      *  items, the default behavior is preferable because it makes it less
-     *  likely that the component's content will not obscured by a scrollbar.</p>
+     *  likely that the component's content will not obscured by a scroll bar.</p>
      * 
      *  @default true
      */

 *  Rather than allow the child to extend past the boundaries of the parent container, 
 *  the Scroller specifies to clip the child to the boundaries and display scroll bars.</p>
 *
 *  <p>For Spark containers that do not implement the IViewport interface, 
 *  you can still use scroll bars. 
 *  To add scroll bars, create a custom skin for the container that 
 *  includes the Scroller control. </p>
 * 
 *  <p>The IViewport interface define a viewport for the components that implement it.
 *  A viewport is a rectangular subset of the area of a container that you want to display, 
 *  rather than displaying the entire container.
 *  The scrollbars control the viewport's <code>horizontalScrollPosition</code> and
 *  <code>verticalScrollPosition</code> properties.
 *  Scrollbars make it possible to view the area defined by the viewport's 
 *  <code>contentWidth</code> and <code>contentHeight</code> properties.</p>
 *
 *  <p>You can combine scroll bars with explicit settings for the container's viewport. 

    //--------------------------------------------------------------------------
    
    /**
     *  Constructor.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
