div.crop{
    height:36px;
    overflow:hidden;
    width:325px;
}
div.crop a{
    float:left;
    height:36px;
    margin-top:0px;
    background-repeat:no-repeat;
    background-position:0px 0px;
}
div.crop a:hover{
    /*position:relative;*/
    background-position:0px -36px;
}
div.crop a img{
    visibility:hidden;
}
#buenosaires{background-image:url('../img/clubes-bsas.gif');}
#mendoza{background-image:url('../img/clubes-mendoza.gif');}
#chubut{background-image:url('../img/clubes-chubut.gif');}
#rionegro{background-image:url('../img/clubes-rionegro.gif');}
#corrientes{background-image:url('../img/clubes-corrientes.gif');}
#santafe{background-image:url('../img/clubes-santafe.gif');}
#entrerios{background-image:url('../img/clubes-entrerios.gif');}
#misiones{background-image:url('../img/clubes-misiones.gif');}
#chaco{background-image:url('../img/clubes-chaco.gif');}