To activate debug to the javascript console (so you can open the Firefox Firebug Console
or the Opera Dragonfly console, or any other JS debug console), simply rename:
"soundmanager2.js" to "soundmanager2_REAL.js",
"soundmanager2_debug.js" to "soundmanager2.js"
and "soundmanager2.min.js" to "soundmanager2_REAL.min.js".

To deactivate debug, rename:
"soundmanager2.js" to "soundmanager2_debug.js",
"soundmanager2_REAL.js" to "soundmanager2.js"
and "soundmanager2_REAL.min.js" to "soundmanager2.min.js".