var z= 1;
Banner = new Array(z);

Banner[0] = '<a href="http://www.ontrack.com/datarecovery/servicequote.asp?PartnerID=2025269"><img src="http://www.ontrack.com/partner/PartnerGraphics/Web Banner/banner_rfq468x60_01.gif" width="468" height="60" border="0" alt="data recovery"></a>';

var jetzt=new Date();
var z=(jetzt.getSeconds())%1;
document.write(Banner[z]);