function start() {
    if (GBrowserIsCompatible()) {
        var lat = 51.542928;
        var lng = 0.648148;
        var map = new GMap2(document.getElementById("clgmap"));
        var point = new GLatLng(lat, lng);
        map.setCenter(point, 15);

        var pinImage = new GIcon(G_DEFAULT_ICON);
        pinImage.image = "http://www.joltsolutions.com/imgs/JOLTPin.png";
        pinImage.iconSize = GSize(60, 60);
        pinImage.shadow = "";
        markerOptions = { icon: pinImage };

        var marker = new GMarker(point, markerOptions);

        map.addOverlay(marker);

    }
}

function startLarge() {
    if (GBrowserIsCompatible()) {
        var lat = 51.542928;
        var lng = 0.648148;
        var map = new GMap2(document.getElementById("tgmap"));
        map.setUIToDefault();
        map.setMapType(G_PHYSICAL_MAP);

        var point = new GLatLng(lat, lng);
        map.setCenter(point, 15);

        var pinImage = new GIcon(G_DEFAULT_ICON);
        pinImage.image = "http://www.joltsolutions.com/imgs/JOLTPin.png";
        pinImage.iconSize = GSize(60, 60);
        pinImage.shadow = "";
        markerOptions = { icon: pinImage };

        var marker = new GMarker(point, markerOptions);

        map.addOverlay(marker);

    }
}