Set Sound volume
<html> <head> <body> <bgsound id="mySound" src="fake.mp3" balance="0" loop="1"> <script> function function1() { document.all.mySound.src = "fake.mp3"; document.all.mySound.balance = -10000; document.all.mySound.volume = -3000; } </script> </head> <body onLoad="function1();"> <input type="button" value="balance = -10000" onClick="function1();"> </body> </html>