function disableSubmit(whichButton)
{
    if (document.getElementById)
    {
        // this is the way the standards work
        document.getElementById(whichButton).disabled = true;
    }
    else if (document.all)
    {
        // this is the way old msie versions work
        document.all[whichButton].disabled = true;
    }
    else if (document.layers)
    {
        // this is the way nn4 works
        document.layers[whichButton].disabled = true;
    }
}