a#replaced1 {
    display:block;
    text-indent:-9999em;
    width:32px;
    height:32px;
    background: url(info.png) top left no-repeat;
}

a#replaced2 {
    display:block;
    text-indent:-9999em;
    width:32px;
    height:32px;
    background: url(inscripcion.png) top left no-repeat;
}

a#replaced3 {
    display:block;
    text-indent:-9999em;
    width:32px;
    height:32px;
    background: url(becas.png) top left no-repeat;
}



a#replaced1:hover {
    background-position:0px -32px;
}

a#replaced2:hover {
    background-position:0px -32px;
}

a#replaced3:hover {
    background-position:0px -32px;
}