code: public void setDownFace(String text, String imageClass) {
  
          m_downImageClass = imageClass;
          getDownFace().setHTML(getFaceHtml(text, imageClass));
      }
docs: Sets the down face text and image.<p>
  
  @param text the down face text to set, set to <code>null</code> to not show any
  @param imageClass the down face image class to use, set to <code>null</code> to not show any