var map = null;
    var geocoder = null;
    var marker;
    function initialize(newaddress)
    {
        if (GBrowserIsCompatible())
        {
            map = new GMap2(document.getElementById("map"));
            map.addControl(new GLargeMapControl());                 //加入地圖縮放工具
            map.addControl(new GMapTypeControl());                 //加入地圖切換的工具
            map.addMapType(G_PHYSICAL_MAP);                         //加入地形圖
            map.setCenter(new GLatLng(25.001689, 121.460809), 8);   //設定台灣為中心點
            geocoder = new GClientGeocoder();
            showAddress(newaddress);
        }
    }

    function createMarker(point,title,html)
    {
        var marker = new GMarker(point);

        GEvent.addListener(marker, "click", function()
        {
            marker.openInfoWindowHtml(
                html,
                {
                    maxContent: html,
                    maxTitle: title}
                );
        });
        return marker;
    }

    function showAddress(address)
    {
        if (geocoder)
        {
            geocoder.getLatLng(
                address,
                function(point)
                {
                    if (!point)
                    {
                        alert(address + " not found");
                    }
                    else
                    {
                        if(marker)  //移除上一個點
                        {
                            map.removeOverlay(marker);
                        }

                        map.setCenter(point, 13);

                        var title = "地址";

                        marker = createMarker(point,title,address);

                        map.addOverlay(marker);

                        marker.openInfoWindowHtml(
                            address,
                            {
                                maxContent: address,
                                maxTitle: title}
                            );
                    }
                }
            );
        }
    }