function updateLocation(lat_field, lon_field, point) {
    document.getElementById(lat_field).value = point.lat;
    document.getElementById(lon_field).value = point.lon;
    map.removeAllMarkers();
    map.addMarker(new Marker(point));
    
}

function updateMapBounds(lat_field, lon_field) {
    mapcenter = map.getCenter(); 
    document.getElementById(lat_field).value = mapcenter.lat; 
    document.getElementById(lon_field).value = mapcenter.lon;

}

function updateZoomLevel(zoom_field) {
    document.getElementById(zoom_field).value = map.getZoom(); 
}


function zoomToMarker(latitude, longitude, regionlink, title) {
    windowHtml = "<h1>" + title + "</h1>" + "<p><a href=\"" + regionlink + "\">Show Dive Sites</a></p>"
    map.openInfoWindowHtml(new GLatLng(latitude, longitude), windowHtml);

}