var as3Ready = false;
var soundOn = true;
var turnedOff = false;

function flashReady(value)
{
    as3Ready = true;
    checkSound();
}

function turnSoundOff()
{
    soundOn = false;
    checkSound();
}

function checkSound()
{
    if (as3Ready && !soundOn && !turnedOff)
    {
        var swf = getEmbedObject("swfBanner");
        swf.setSound(false);
        turnedOff = true;
    }
}