The Used midi files are given in the source of a webpage.
To find what midi file is used, with internet explorer go
to display >> source (i have a french version of internet explorer
the english word may change)
Try to search: .mid in the source (use the search function
of notepad or what you are using to watch the source code)
Using this way, you find or the relative path:
For example:
bgsound src="zbimbo.mid"
or the absolute path, for example:
bgsound src="http://monserveur.com/zbimbo.mid"
In the first case, get the full adress of the webpage you are watching the source
remove the file name (remove the part after the last slash)
and replace it with the name of the midi file.
Enter the adress in your browser and you should get the midi file.
You can do the last operation in a download manager.
If the second case just copy and paste the adress in a browser.