Google Maps API

<script src="http://maps.google.com/maps?file=api&amp;v=2.x&amp;key=ABQIAAAAzr2EBOXUKnm_jVnk0OJI7xSosDVG8KKPE1-m51RBrvYughuyMxQ-i1QfUnH94QxWIa6N4U6MouMmBA" type="text/javascript"></script>
<script type="text/javascript">
var map = null;
var geocoder = null;
function showAddress(address) {
    var map = new GMap2(document.getElementById("map_canvas"));
        var geocoder = new GClientGeocoder();
    if (geocoder) {
        geocoder.getLatLng(address, function(point) {
            if (!point) {
                alert(address + " kunne ikke findes!");
            } else {
                map.setCenter(point, 14);
                var marker = new GMarker(point);
                map.addOverlay(marker);
            }
        });
    }
}
</script>
<a href="#" onclick="showAddress('Rådhuspladsen, københavn');">Find rådhuspladsen</a>
<div id="map_canvas" style="width: 400px; height: 250px"></div>