.citymap {
     position: relative;
    top: 0px;
    left: 0px; 
}

.citymap img {
     position: relative;
    top: 0px;
    left: 0px; 
}
.citymap img.map {
    position: absolute;
    top: 0px;
    left: 0px;  
    display: none;
}
.citymap img.map.active {
    display: block;
}