function gmOpen(){
    Shadowbox.open({
        player:     'html',
        content:    '',
        height:     480,
        width:      640,
        options:    {
            onFinish: function(item){
                if(GBrowserIsCompatible()){
                    var body = document.getElementById(Shadowbox.contentId());
                    var map = new GMap2(body);
					var point = new GLatLng(35.637698, 139.666857);
                    map.setCenter(point, 16);
					var iconObj = new GIcon();
					iconObj.image = "img/top/map_icon.png";
					iconObj.iconSize = new GSize(157,78);
					iconObj.iconAnchor = new GPoint(78, 75);

					var opt = {icon:iconObj};
					var marker = new GMarker(point, opt);
					map.addOverlay(marker);

                    // add some simple controls
                    map.addControl(new GSmallMapControl());
                    map.addControl(new GMapTypeControl());
                }
            }
        }
    });
}