// $Id: adfunc.js,v 1.1 2010/03/30 13:58:53 rschmitz Exp $

function ad(position)
{
  if( position == 'rectangle_lower' )
  {
    document.write('<div id="secondad">'); 
    document.write('<img src="img/ad1.gif" width="300" height="250" alt="rectangle lower" />');
    document.write('</div>'); 
  }
}