GDownloadUrl, KML, Sidebar and Icons

Question

Hello,

I have experience of embedding Google Maps into web-pages and extensive programming experience.

I have created a web-page that uses a call to GDownloadUrl with a KML file generated in Google Earth. A sidebar is generated and a check- boxes act as filters on the placemarks.

The issue I have is that the code overwrites the icon styles in the KML, but I don't know how to inherit the styleURL from the KML file in the JavaScript code? The complicating issue is the requirement of a filter system.

http://www.maiocv.com/test/map/google-maps.html

Hope that is clear? Is there a better method?

Thanks,

Mark.