This var is set to "false". Set it to "true" !


			var wantMedia		= true;


..... some lines later.....
Here you have to add the code lines marked in blue 

			if (wantMedia && size) {
				// show media preview or thumbnail based on file extension
				ext = name.substring(name.lastIndexOf(".") + 1, name.length);
				ext = ext.toLowerCase();
				if (ext == 'avi' || ext == 'mov' || ext == 'qt' || ext == 'mpe' || ext == 'mpeg' || ext == 'mpg') {
					// show a movie player
					document.all.Media.innerHTML = '< object ID="Player" style="width: 160px; height: 148px" classid=clsid:05589FA1-C356-11CE-BF01-00AA0055595A > < param name="FileName" value="' + items.Path + '" > < param name=ShowDisplay value=0 > < param name=BorderStyle value=0 > < /object >';
				} else if (ext == 'aif' || ext == 'aifc' || ext == 'aiff' || ext == 'au' || ext == 'mid' || ext == 'rmi' || ext == 'snd' || ext == 'wav') {
					// show a sound player
					document.all.Media.innerHTML = '< object ID="Player" style="width: 160px; height: 28px" classid=clsid:05589FA1-C356-11CE-BF01-00AA0055595A > < param name="FileName" value="' + items.Path + '" > < param name=ShowDisplay value=0 > < /center > < /object>'

				} else if (ext == 'bmx' || ext == 'bmw') {
				  document.all.Media.innerHTML =
					  "<embed "+
					  "src = " + name + " " +
					  "TYPE= \"audio/x-bmx\" "+
					  "WIDTH=200 HEIGHT=80 "+
					  "PLUGINSPAGE=\"http://www.chilleddreams.de/buzz/\" "+
					  "BACKCOLOR = \"0xff, 0xff, 0xff\" "+
					  "GRAPHCOLOR = \"0x00, 0x00, 0xff\" "+
					  "TICKCOLOR = \"0xff, 0x80, 0x00\" "+
					  "INFOCOLOR = \"0x70, 0x70, 0x70\" "+
					  "AUTOSTART = 1 "+
					  "SCROLLSPEED = 30 "+
					  "MACHINEINFO = \"http://www.chilleddreams.de/machinelist.buzzinfo\""+
					  ">";

				}
			}