http://software.hixie.ch/utilities/js/live-dom-viewer/?saved=2643
In my testing, getSVGDocument is supported on <embed>, <frame>, <iframe> and <object> in Firefox Nightly, IE11 Preview, Safari 7.0 and Opera 12.16, the only exception being frame.getSVGDocument in Firefox. I don't know if this API is actually useful, but since it's already implemented everywhere it should probably be spec'd. Philip