var ban=new Date();
if(ban.getSeconds()%2==0||ban.getSeconds()%5==0){//0|2
document.write('<A HREF="http://adserver1.realtracker.com/banman.asp?ZoneID=99&Task=Click&Mode=HTML&PageID=16563" target="RealTracker">');
document.write('<img src="http://adserver1.realtracker.com/banman.asp?ZoneID=99&Task=Get&Mode=HTML&PageID=16563" border=0 width=88 height=31></A>');
} else {
document.write('<A HREF="http://www.gratiz.nl" target="_blank">');
document.write('<img src="http://www.gratiz.nl/freetrac.gif" border=0 width=88 height=31></A>');
}