function changeDivImage()
{
    document.getElementById("s-radio").style.background = "url(images/radio_bg.gif) 9px 0 no-repeat";
}
function changeDivImage2()
{
    document.getElementById("s-radio").style.background = "url(images/radio_bg.gif) 69px 0 no-repeat";
}
function changeDivImage3()
{
    document.getElementById("s-radio").style.background = "url(images/radio_bg.gif) 143px 0 no-repeat";
}