.mapa {
width: 1150px;
height: 1000px;
background:url(http://www.orlickehory.eu/images/hlavni_rozcestnik.jpg);
margin-left: auto;
margin-right: auto;
}
.pomocny  {
position: absolute;
}
#nav {
    margin: 0;
    padding: 0;
    width: 1150px;
    height: 1000px;
}

#nav a#kacenka {
    background: url(http://www.orlickehory.eu/images/kacenka_vpravo.jpg);
    width: 278px;
    height: 238px;
    position: absolute;
    left: 562px;
    top: 239px;
}
#nav a:hover#kacenka {
    background: url(http://www.orlickehory.eu/images/kacenka_vpravo_over.jpg);
    width: 278px;
    height: 238px;
    position: absolute;
    left: 562px;
    top: 239px;
}
#nav a#dso {
    background: url(http://www.orlickehory.eu/images/dso_vlevo.jpg);
    width: 244px;
    height: 250px;
    position: absolute;
    left: 286px;
    top: 242px;
}
#nav a:hover#dso {
    background: url(http://www.orlickehory.eu/images/dso_vlevo_over.jpg);
    width: 244px;
    height: 250px;
    position: absolute;
    left: 286px;
    top: 242px;
}