Earlier quoted context omitted.
"Hidden?" Give IE some respect...its rendering may have been crap, but it had plenty of features like this for building robust web applications years before the cool kids realized that might be a good idea.
Yes, that's exactly what I was trying to get at, evidently unsuccessfully. For all of IE's failings, it does seem to have been first to support an awful lot of scripting features. They've always been documented , but hardly anyone seems to know about them until the other browsers popularise them, and even then IE's implementation seems to be forgotten, presumably because APIs are nonstandard and the docs use differen…
dHTML+TIME could even use dynamic generated music
http://en.wikipedia.org/wiki/DirectX_Media
But I guess Microsoft is too obsessed with .Net and Silverlight now.