y=0;
ad=new Array(y);
var bnum=new Number(Math.floor(99999999 * Math.random())+1);


//ad[y++]='<a href="http://www.astrolabio.net/adserver/adserver-alfa.cgi?' + bnum + '+L=URL" target="_blank" onMouseOver="window.status=\'<<< Click Aqui ! >>>\'; return true" onMouseout="window.status=\'\';return true;"><img border="0" src="http://www.astrolabio.net/adserver/adserver-alfa.cgi?' + bnum + '+L=IMG" alt="Haga Click Aqui !" width="120" height="600"></a>'

ad[y++]='<iframe src="http://c5.zedo.com/jsc/c5/ff2.html?n=419;c=88;s=88;d=8;w=120;h=600" frameborder=0 marginheight=0 marginwidth=0 scrolling="no" allowTransparency="true" width=120 height=600></iframe>'

x = Math.floor(Math.random()*(y));
document.write(ad[x]);