if(document.getElementById("block-20"))
	document.getElementById("block-20").innerHTML = '<iframe frameborder="0" src="http://smallpages.com.ar/Block/frameEmbed?k=20&v=1&contId=block-20" width="100%" height="100%" allowtransparency="1"></iframe>';
else{
	document.write('<div id="block-20" style="float:left;clear:both;width:250px;height:300px;background:#ffffff;border:1px solid #ccc;"></div>');
	document.getElementById("block-20").innerHTML = '<iframe frameborder="0" src="http://smallpages.com.ar/Block/frameEmbed?k=20&v=1&contId=block-20" width="100%" height="100%" allowtransparency="1"></iframe>';
}