How can I place a html div over the Google Earth plugin? Involves wmode, I imagine

I put together a demo showing how to use IFRAME shims here:

http://earth-api-samples.googlecode.com/svn/trunk/demos/customcontrols/index.html

The there is no direct support for overlaying 'z-indexing' a div either in the Api or Dom. The plug-in loads an executable file that, in very simple terms, punches a hole in the browser window. Using the 'iframe shim' technique is the standard workaround although transparency can be tricky.

There is an open Feature request for this functionality to be added to the api - the comments section has some good information and links.

Also, there is a great online demo of this here

If it is a plugin, then you cannot reliably place other elements over the top of it. Browsers usually let go of most of their ability to 'layer' elements when plugins are involved.

I guess an Iframe may be a way around it, as long as you check that this still works on most browsers.