var imagenumber = 10 ; //Anzahl der Grafiken
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;

anzeige = new Array

anzeige[1]  = '<a href="http://partners.webmasterplan.com/click.asp?ref=5503&site=1879&type=b24&bnb=24" target="_blank">'
            + '<img src="http://banners.webmasterplan.com/view.asp?site=1879&ref=5503&b=24" '
            + 'alt="Tchibo.de - Jede Woche eine neue Welt!" width="468" height="60" border="0"></a>'

anzeige[2]  = '<a href="http://partners.webmasterplan.com/click.asp?ref=5503&site=3657&type=b26&bnb=26" target="_blank">'
            + '<img src="http://banners.webmasterplan.com/view.asp?ref=5503&site=3657&b=26" '
            + 'alt="Top-Angebote bei QUELLE" width="468" height="60" border="0"></a>'

anzeige[3]  = '<a href="http://partners.webmasterplan.com/click.asp?ref=5503&site=1300&type=b33&bnb=33" target="_blank">'
            + '<img src="http://banners.webmasterplan.com/view.asp?ref=5503&site=1300&b=33" '
            + 'alt="Abebooks.de - Neue und gebrauchte Bücher" width="468" height="60" border="0"></a>'

anzeige[4]  = '<a href="http://click.jamba.de/click.asp?ref=5503&site=2703&type=b128&bnb=128" target="_blank">'
            + '<img src="http://view.jamba.de/view.asp?ref=5503&site=2703&b=128" '
            + 'alt="Jamba! Handy Fun & Jamba! SIM" width="468" height="60" border="0"></a>'

anzeige[5]  = '<a href="http://partners.webmasterplan.com/click.asp?ref=5503&site=1382&type=b638&bnb=638" target="_blank">'
            + '<img src="http://banners.webmasterplan.com/view.asp?site=1382&ref=5503&b=638" '
            + 'alt="eBay" width="468" height="60" border="0"></a>'

anzeige[6]  = '<a href="http://partners.webmasterplan.com/click.asp?ref=5503&site=1977&type=b1&bnb=1" target="_blank">'
            + '<img src="http://banners.webmasterplan.com/view.asp?site=1977&ref=5503&b=1" '
            + 'alt="united-domains.de - Domains weltweit registrieren" width="468" height="60" border="0"></a>'

anzeige[7]  = '<a href="http://www.epilog.de/shayol/1000/1014_Visionen_2/" target="_top">'
            + '<img src="http://www.epilog.de/shayol/1000/1014_Visionen_2/Daten/1014_B468x060a.gif" '
            + 'alt="Die Legende von Eden und andere VISIONEN" width="468" height="60" border="0"></a>'

anzeige[8]  = '<a href="http://www.affiliwelt.net/klick.php?bannerid=9994&pid=11297&prid=908" target="_blank">'
            + '<img src="http://view-affiliwelt.net/view.php?bannerid=9994&pid=11297&prid=908" '
            + 'alt="eBooks zum Sofort Download" width="468" height="60" border="0"></a>'

anzeige[9]  = '<a href="http://www.epilog.de/shayol/3000/3003/index.html">'
            + '<img src="http://www.epilog.de/shayol/3000/3003/daten/3003_B468x060a.gif" '
            + 'alt="Bang Bang stirbt" width="468" height="60" border="0"></a>'

anzeige[10] = '<a href="http://www.epilog.de/shayol/2000/2901_Robinson_Dick/Index.html" target="_top">'
            + '<img src="http://www.epilog.de/shayol/2000/2901_Robinson_Dick/Daten/2901_B468x060a.jpg" '
            + 'alt="Kim Stanley Robinson: Die Romane des Philip K. Dick" width="468" height="60" border="0"></a>'

var einblendung = anzeige[rand1];

document.write(einblendung);