function voorpageen()
{
//0
var ranNum= Math.round(Math.random() * 0);
if (ranNum == 0){document.write('<!--start shipsworld--><center><a href="http://www.nauticlink.com/cgi-wrap/nlps/go.cgi?id=10985" target="_blank"><img src="/ads/shipsworld300.gif"  border=0></a></center><!--einde shipsworld--> <br><!--start yachtvision--><center><a href="http://www.nauticlink.com/cgi-wrap/nlps/go.cgi?id=13857" target="_blank"><img src="/ads/yachtvision300.gif"  border=0></a></center><!--einde yachtvision-->'); } // bovenste
}