num=5
pub = new Array(); 
pub[0] ='<a href="http://count.chanet.com.cn/click.cgi?a=4801&d=98722&u=&e=" target="_blank"><IMG SRC="http://file.chanet.com.cn/image.cgi?a=4801&d=98722&u=&e=" width="950" height="60" border="0"></a>'
pub[1] ='<a href="http://count.chanet.com.cn/click.cgi?a=4801&d=98605&u=&e=" target="_blank"><IMG SRC="http://file.chanet.com.cn/image.cgi?a=4801&d=98605&u=&e=" width="940" height="80" border="0"></a>';
pub[2] ='<IFRAME FRAMEBORDER="0" ALLOWTRANSPARENCY="true" MARGINHEIGHT="0" MARGINWIDTH="0" SCROLLING="NO" width="960" height="60" SRC="http://file.chanet.com.cn/script.cgi?a=4801&d=22875&u=&e="></IFRAME>';
pub[3] ='<a href="http://count.chanet.com.cn/click.cgi?a=4801&d=94613&u=&e=" target="_blank"><IMG SRC="http://file.chanet.com.cn/image.cgi?a=4801&d=94613&u=&e=" width="960" height="90" border="0"></a>';
pub[4] ='<a href="http://count.chanet.com.cn/click.cgi?a=4801&d=110386&u=&e=" target="_blank"><IMG SRC="http://file.chanet.com.cn/image.cgi?a=4801&d=110386&u=&e=" width="960" height="90" border="0"></a>';
pub[5] ='<iframe src="http://u.1133.cc/showpage.php?pid=143504" MARGINWIDTH=0 MARGINHEIGHT=0  HSPACE=0 VSPACE=0 FRAMEBORDER=0 SCROLLING=no HEIGHT=80 WIDTH=950></iframe>'
rndpub= parseInt(Math.random() * num );
document.write("<center>");
document.write(pub[rndpub]);
document.write("</center>");