a.btnRight 
{
    display: block; width: 14px; height: 12px;
    background-image: url(images/icon_next.gif);
    background-position: center; background-repeat: no-repeat;
}

a.btnLeft 
{
    display: block; width: 14px; height: 12px;
    background-image: url(images/icon_back.gif);
    background-position: center; background-repeat: no-repeat;
}

a.btnUp
{
    display: block; width: 12px; height: 6px;
    background-image: url(images/icon_up.gif);
    background-position: center; background-repeat: no-repeat;
}

a.btnDown
{
    display: block; width: 12px; height: 6px;
    background-image: url(images/icon_down.gif);
    background-position: center; background-repeat: no-repeat;
}