Google Mapで座標を取得

つぎはぎつぎはぎで、とりあえず動作。
感謝です m(_ _)m
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
    <title>Google Map : 緯度経度の取得</title>

    <style type="text/css">
      @import url("http://www.google.com/uds/css/gsearch.css");
      @import url("http://www.google.com/uds/solutions/localsearch/gmlocalsearch.css");
    </style>

    <script src="http://maps.google.com/maps?file=api&v=2&key=(key)"
      type="text/javascript" charset="utf-8"></script>

    <script src="http://www.google.com/uds/api?file=uds.js&amp;v=1.0" type="text/javascript"></script>
    <script src="http://www.google.com/uds/solutions/localsearch/gmlocalsearch.js" type="text/javascript"></script>    
    <script type="text/javascript">

    function load() {
      if (GBrowserIsCompatible()) {
        map = new GMap2(document.getElementById("map"));
        map.addControl(new GMapTypeControl());
        map.addControl(new GLargeMapControl());
//        map.setCenter(new GLatLng(35.6226,139.6987), 13);
        map.setCenter(new GLatLng(36.0,137.0), 4);
        // bind a search control to the map, suppress result list
        map.addControl(new google.maps.LocalSearch(), new GControlPosition(G_ANCHOR_BOTTOM_RIGHT, new GSize(10,20)));
      }
    }

    function getCenterLatLng(){
      var latlng = map.getCenter();
      document.getElementById("Ydat").value = latlng.lat();
      document.getElementById("Xdat").value = latlng.lng();
    }

    </script>
  </head>

  <body onload="load()" onunload="GUnload()">

   <div id="map" style="width: 600px; height: 400px"></div>
   <p><form>
       <input type="button" value="座標を取得する" onClick="getCenterLatLng()" /><br />
       緯度(LAT)：<input type="text" id="Ydat" /><br />
       経度(LNG)：<input type="text" id="Xdat" /><br />
   </form></p>

  </body>
</html>