boton_reserves_on_cat      = new Image();
boton_reserves_on_cat.src  = "/sanmartin/images/btreservescat.jpg";
boton_reserves_off_cat     = new Image();
boton_reserves_off_cat.src = "/sanmartin/images/btreservescat2.jpg";

boton_reserves_on_esp      = new Image();
boton_reserves_on_esp.src  = "/sanmartin/images/btreservesesp.jpg";
boton_reserves_off_esp     = new Image();
boton_reserves_off_esp.src = "/sanmartin/images/btreservesesp2.jpg";

boton_reserves_on_uk      = new Image();
boton_reserves_on_uk.src  = "/sanmartin/images/btreservesuk.jpg";
boton_reserves_off_uk     = new Image();
boton_reserves_off_uk.src = "/sanmartin/images/btreservesuk2.jpg";

function rolloverReservesCat(img){
  img.src = boton_reserves_off_cat.src;
}
function rolloutReservesCat(img){
  img.src = boton_reserves_on_cat.src;
}

function rolloverReservesEsp(img){
  img.src = boton_reserves_off_esp.src;
}
function rolloutReservesEsp(img){
  img.src = boton_reserves_on_esp.src;
}

function rolloverReservesUk(img){
  img.src = boton_reserves_off_uk.src;
}
function rolloutReservesUk(img){
  img.src = boton_reserves_on_uk.src;
}