var how_many_ads = 14;

var now = new Date()

var sec = now.getSeconds()

var ad = sec % how_many_ads;

ad +=1;

if (ad==1) {url="http://ads.astronet.pl/banner/astronet_n.cgi?hit&57"; banner="http://ads.astronet.pl/banner/astronet_n.cgi?view&57";}

if (ad==2) {url="http://www.meteoryt.z.pl/"; banner="http://astro.ia.uz.zgora.pl/~simkoz/meteoryt/buttons/ban_mti.jpg";}

if (ad==3) {url="http://www.solaris.z.pl/"; banner="http://solaris.ifd.uni.wroc.pl/images/banner/banner_solaris.gif";}

if (ad==4) {url="http://www.adk.nk.prv.pl/"; banner="http://adk.astronet.pl/images/banner420x60.jpg";}

if (ad==5) {url="http://www.komety.prv.pl/"; banner="http://komety.webpark.pl/gfx/baner.jpg";}

if (ad==6) {url="http://www.atlas-wszechswiata.pl/"; banner="http://www.atlas-wszechswiata.pl/atlas2.gif"}

if (ad==7) {url="http://www.astrofotografia.dip.pl/"; banner="http://www.astrofotografia.dip.pl/dane/banner/astro/astrofotografia.gif";}

if (ad==8) {url="http://sswdob.republika.pl/"; banner="http://sswdob.republika.pl/sswlogo/ssw-baner.gif";}

if (ad==9) {url=" http://astronomia2004.er.pl/"; banner="http://astronomia2004.elpronet.pl/aaa.jpg";}

if (ad==10) {url="http://www.astronomia.pl/baner_p.php?17"; banner="http://www.astronomia.pl/baner_n.php?17";}

if (ad==11) {url="http://ksiezyce.republika.pl/"; banner="http://ksiezyce.republika.pl/images/banner_moons_anim.gif";}

if (ad==12) {url="http://www.astrocd.astronomia.pl"; banner="http://www.astrocd.pl/astrocd.gif";}

if (ad==13) {url="http://www.astronomia.goldhand.pl"; banner="http://www.astronomia.goldhand.pl/astrologo3.jpg";}

if (ad==14) {url="http://www.teleskopytaurus.pl/"; banner="http://www.teleskopytaurus.pl/img/bannertaurus.jpg";}





document.write('<a href="' + url + '" target="_blank"><img src="' + banner + '" border="0" alt="Reklama" vspace="4"></a>');