Is it possible in web page on Internet Explorer to detect if the Google Earth application is installed on the client machine using Javascript?
This page is part of a Trusted Site on an intranet.
Update: detecting it via creating an ActiveX object or any IE specific javascript is fine.
I don't think this works using Javascript. I'm pretty sure Google Earth doesn't install a plugin into Internet Explorer (or any other browser for that matter). So you can forget Javascript.
As you are on a trusted site you may try using ActiveX. I'm not into ActiveX but maybe there's a way to have a deeper look into the client's system.