if(pbl){
google_ad_client = "ca-pub-3725963239040897";
/* 728x90_Xtec2 */
google_ad_slot = "9378146061";
google_ad_width = 728;
google_ad_height = 90;
document.writeln('<scr'+'ipt type="text/javascr'+'ipt" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></scr'+'ipt>');
}else{
with(document){
writeln('<table width="728" height="86" align="center">');
writeln('<tr><td class="pub" height="80" align="center"><font color="#B0E060">');
writeln('[ <a href="http://www.astromia.com/astronomia/index.htm" target="_blank">');
writeln('<b>Lecturas de Astronomía</b></a> ] &nbsp; &nbsp;');
writeln('[ <a href="http://www.astromia.com/biografias/index.htm" target="_blank">');
writeln('<b>Biografías de Científicos</b></a> ] &nbsp; &nbsp;');
writeln('[ <a href="http://www.fotonostra.com/glosario/index.htm" target="_blank">');
writeln('<b>Diccionario de fotografía y Diseño</b></a> ]<br><br>');
writeln('[ <a href="http://www.fotonostra.com/fotografia/index.htm" target="_blank">');
writeln('<b>Fotografía Analógica y Digital</b></a> ] &nbsp; &nbsp;');
writeln('[ <a href="http://www.fotonostra.com/grafico/index.htm" target="_blank">');
writeln('<b>Diseño Gráfico</b></a> ] &nbsp; &nbsp;');
writeln('[ <a href="http://www.fotonostra.com/albums/america/index.htm" target="_blank">');
writeln('<b>Fotos de América</b></a> ] &nbsp; &nbsp;');
writeln('[ <a href="http://www.fotonostra.com/albums/index.htm" target="_blank">');
writeln('<b>Galerías de Fotos</b></a> ]<br>');
writeln('</font></td></tr><tr><td height="4"></td></tr></table>');
}
}