Adding KML to Google Map with iframe

Question

'm trying to add a KML to Google Map. Each point in the KML file contains an iframe that loads an external html file, like in the example below. The point is shown OK on the map, except the iframe content never shows.

Does this get stripped by Google Map? Is there any way to load external content into the InfoWindow when you click on this point? I have 100s of html files and can't include them all into KML files. So any help is appreciated.

Thanks

</Placemark>    
 <name>2</name>
 <styleUrl>#KMLStyler_2</styleUrl>
 <description><iframe width="200px" height="200px" src="http://www.bbc.co.uk"&gt;BBC&lt;/iframe&gt;&lt;/description&gt;
 <Point>
  <coordinates>13.860215,67.067052,0.000000</coordinates>
 </Point>
</Placemark>