#btnUp{
background-image: url(arrow_up_grey.gif);
background-repeat: no-repeat;
height: 25px;
width: 25px;

}

#btnUp.over {
background-image: url(arrow_up_over.gif);
background-repeat: no-repeat;
text-decoration:none;
}


#btnDown{
background-image: url(arrow_down_grey.gif);
background-repeat: no-repeat;
height: 25px;
width: 25px;
}

#btnDown.over {
background-image: url(arrow_down_over.gif);
background-repeat: no-repeat;
text-decoration:none;

}