img = new Array(4); 
img[0] = "<a href=http://www.mlodeiglupie.pl/?ref=lolidka&nw><img src=baners/mlodeiglupie.gif alt='głupie nastolatki' width=200 height=200 border=0></a>";
img[1] = "<a href=http://www.mlodeles.pl/?ref=lolidka&nw><img src=baners/mlodeles.gif alt='młode lesbijki' width=200 height=200 border=0></a>";
img[2] = "<a href=http://www.najmlodsze.pl/?ref=lolidka><img src=baners/najmlodsze.gif alt='najmłodsze laski w sieci' width=200 height=200 border=0></a>";
img[3] = "<a href=http://www.nastoletniemodelki.pl/?ref=lolidka&nw ><img src=baners/nastoletniemodelki.gif alt='ostre nastolatki' width=200 height=200 border=0></a>";
index = Math.floor(Math.random() * img.length);
document.write( img[index] );