kaart.css

.olImageLoadError { 
    display: none;
    opacity: 0.8;
} 

html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    font-family: sans-serif;
}

#map {
    margin: 0;
    width: 100%;
    height: 100%;
}

#LayersSwitcher {
}

#popup {
    margin: 0;
    width: 50%;
    height=50%;
    font-family: bold;
}

#buttonbar {
    display: block;
    position: absolute;
    bottom: 1em;
    left: 1em;
    width: 20%;
}

#buttonbar #button {
    display: block;
    position: relative;
    width: 100%;
}

#button #title {
    display: block;
    position: relative;
    z-index: 20000;
    background-color: #DDDDDD;
    opacity: 0.5;
    font-family: sans-serif;
    font-size: 12;
    padding: 0 0.5em 0 0.5em;
}

#button #explain {
    display: none;
}

#button:hover #explain {
    display: block;
    position: relative;
    z-index: 20000;
    background-color: #DDDDDD;
    opacity: 0.7;
    font-family: sans-serif;
    font-size: 10;
    padding: 0 0.5em 0.5em 0.5em;
}