boton_hotel_on_cat      = new Image();
boton_hotel_on_cat.src  = "/sanmartin/images/bthotelcat.jpg";
boton_hotel_off_cat     = new Image();
boton_hotel_off_cat.src = "/sanmartin/images/bthotelcat2.jpg";

boton_hotel_on_esp      = new Image();
boton_hotel_on_esp.src  = "/sanmartin/images/bthotelesp.jpg";
boton_hotel_off_esp     = new Image();
boton_hotel_off_esp.src = "/sanmartin/images/bthotelesp2.jpg";

boton_hotel_on_uk      = new Image();
boton_hotel_on_uk.src  = "/sanmartin/images/bthoteluk.jpg";
boton_hotel_off_uk     = new Image();
boton_hotel_off_uk.src = "/sanmartin/images/bthoteluk2.jpg";

function rolloverHotelCat(img){
  img.src = boton_hotel_off_cat.src;
}
function rolloutHotelCat(img){
  img.src = boton_hotel_on_cat.src;
}

function rolloverHotelEsp(img){
  img.src = boton_hotel_off_esp.src;
}
function rolloutHotelEsp(img){
  img.src = boton_hotel_on_esp.src;
}

function rolloverHotelUk(img){
  img.src = boton_hotel_off_uk.src;
}
function rolloutHotelUk(img){
  img.src = boton_hotel_on_uk.src;
}