     }
     
     /**
-     *  If viewport is non null then ask it to compute the horizontal
-     *  scroll position delta for page up/down.  The delta is added
-     *  to this scrollbar's value.  
-     * 
-     *  @see viewport
-     *  @see #setValue
-     *  @see IViewport#horizontalScrollPositionDelta
+     *  If <code>viewport</code> is not null, 
+     *  change the horizontal scroll position for page up or page down by 
+     *  scrolling the viewport.
+     *  This method calculates the amount to scroll by calling the 
+     *  <code>IViewport.horizontalScrollPositionDelta()</code> method 
+     *  with either <code>flash.ui.Keyboard.PAGE_UP</code> 
+     *  or <code>flash.ui.Keyboard.PAGE_DOWN</code>.
+     *  It then calls the <code>setValue()</code> method to 
+     *  set the <code>IViewport.horizontalScrollPosition</code> property 
+     *  to the appropriate value.
+     *
+     *  <p>If <code>viewport</code> is null, 
+     *  change the scroll position for page up or page down by calling 
+     *  the <code>page()</code> method.</p>
+     *
+     *  @param increase Whether the page scroll is up (<code>true</code>) or
+     *  down (<code>false</code>). 
+     * 
+     *  @see mx.components.baseClasses.FxTrackBase#page()
+     *  @see mx.components.baseClasses.FxTrackBase#setValue()
+     *  @see mx.core.IViewport
+     *  @see mx.core.IViewport#horizontalScrollPosition
+     *  @see mx.core.IViewport#horizontalScrollPositionDelta()
      */
     override public function page(increase:Boolean = true):void
     {

 *  the portion of data that is displayed when there is too much data
 *  to fit horizontally in a display area.
 * 
 *  <p>This control extends the base ScrollBar control.</p> 
 *  
 *  <p>Although you can use the FxHScrollBar control as a stand-alone control,
 *  you usually combine it as part of another group of components to
 *  provide scrolling functionality.</p>

    }
    
    /**
     *  If <code>viewport</code> is not null, 
     *  change the horizontal scroll position for line up or line down by 
     *  scrolling the viewport.
     *  This method calculates the amount to scroll by calling the 
     *  <code>IViewport.horizontalScrollPositionDelta()</code> method 
     *  with either <code>flash.ui.Keyboard.RIGHT</code> 
     *  or <code>flash.ui.Keyboard.LEFT</code>.
     *  It then calls the <code>setValue()</code> method to 
     *  set the <code>IViewport.horizontalScrollPosition</code> property 
     *  to the appropriate value.
     *
     *  <p>If <code>viewport</code> is null, 
     *  change the scroll position for line up or line down by calling 
     *  the <code>step()</code> method.</p>
     *
     *  @param increase Whether the line scoll is up (<code>true</code>) or
     *  down (<code>false</code>). 
     * 
     *  @see mx.components.baseClasses.FxTrackBase#step()
     *  @see mx.components.baseClasses.FxTrackBase#setValue()
     *  @see mx.core.IViewport
     *  @see mx.core.IViewport#horizontalScrollPosition
     *  @see mx.core.IViewport#horizontalScrollPositionDelta()
     */
    override public function step(increase:Boolean = true):void
    {
