balance - determines how sound output will be
balanced in right/left stereo output situation. A value of
-10000 is left-only balance, and a value of 10000 represents right-only balance.
A value of 0 represents balanced output between the two stereo output devices.
delay - specifies the number of seconds to
delay before playing the indicated sound file.
loop - Allows the author to specify the number
of times the sound will play.
src - Specifies the URL of the audio file.
Allowed formats are .Wav, .Au and Midi files.
volume - This attribute controls the loudness
level on the output device of the background sound. A value of zero (0)
represents full volume output while -10000 represents zero output volume.
