pdown list under "Color Effect". Change the value of the  "Alpha" slider that appears to zero so that the button becomes  invisible. </li>
                     <li> Using the Accessibility panel, specify a value for the "tabindex" field to give the button a logical position in the tab order. </li>
                     <li> Using the Accessibility panel, specify an accessible name that describes the purpose of the hotspot. </li>
                  </ol>
               </li>
            </ol>
            <p>
	