var map;

function show_map(lat,lng){
    var zoom = 14;
    if (GBrowserIsCompatible()) {
        map = new GMap2(document.getElementById('gmap'));
        map.setCenter(new GLatLng(lat, lng), zoom);
        map.addControl(new GSmallMapControl());
        var point = new GLatLng(parseFloat(lat),parseFloat(lng));
        map.addOverlay(createMarker(point, 0));
    }
}

function createMarker(point, index) {
    var icon = new GIcon();
    var marker = new GMarker(point);
    return marker;
}