y=0;
ad=new Array(y);

ad[y++]='<a href="http://www.astrolabio.net/shopping" target="_blank" onMouseOver="window.status=\'<<< Click Aqui ! >>>\'; return true" onMouseout="window.status=\'\';return true;"><img src="http://barrioperu.terra.com.pe/estebanv/ban/120x60/shopping.gif" alt="Click Aqui !" border="0" width="120" height="60"></a>'
ad[y++]='<a href="http://www.astrolabio.net/teamo" target="_blank" onMouseOver="window.status=\'<<< Click Aqui ! >>>\'; return true" onMouseout="window.status=\'\';return true;"><img src="http://barrioperu.terra.com.pe/estebanv/ban/120x60/teamo1.gif" alt="Click Aqui !" border="0" width="120" height="60"></a>'
ad[y++]='<a href="http://www.astrolabio.net/teamo" target="_blank" onMouseOver="window.status=\'<<< Click Aqui ! >>>\'; return true" onMouseout="window.status=\'\';return true;"><img src="http://barrioperu.terra.com.pe/estebanv/ban/120x60/teamo2.gif" alt="Click Aqui !" border="0" width="120" height="60"></a>'
ad[y++]='<a href="http://www.astrolabio.net/teamo" target="_blank" onMouseOver="window.status=\'<<< Click Aqui ! >>>\'; return true" onMouseout="window.status=\'\';return true;"><img src="http://barrioperu.terra.com.pe/estebanv/ban/120x60/teamo3.gif" alt="Click Aqui !" border="0" width="120" height="60"></a>'

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