function createMap(latitude, longitude, name, overlay) {
    if (GBrowserIsCompatible()) {

        var map = new GMap2(document.getElementById("map"));
        map.addControl(new GSmallMapControl());
        map.setCenter(new GLatLng(latitude, longitude), 13, G_HYBRID_MAP);
        var marker = new GMarker(new GLatLng(latitude, longitude));

        updateMarker(marker, name);
        map.addOverlay(marker);

        if (overlay == "true") {
            map.addControl(new GOverviewMapControl());
        }
    }
}

function updateMarker(marker, html) {
    GEvent.addListener(marker, "click", function() {
        marker.openInfoWindowHtml(html);
    });
}