volume
This property is used to set or change the volume of the sound clip being played. Valid values are from 0, which is maximum volume, to -10,000, which is zero volume. I haven't the slightest clue why this property is implemented in this strange manner, but that's how it works. 
syntax: 
document.allelementID.volume = "value" 
This Property is used to access attributes of the following: 
•	BGSOUND