var map;
    var markers = new Array(1);
    function onLoad() {
      map = new GMap2(document.getElementById("map"));
      map.setCenter(new GLatLng(35.6420903,138.5440216),17);
      map.addControl(new GLargeMapControl());
      map.setMapType(G_NORMAL_MAP);
      var marker = null;
      var n_markers = 0;
      var markeropts = new Object();
      markeropts.title = "";
      marker = new GMarker(new GPoint(138.5440216,35.6420903), markeropts);
      markers[n_markers] = marker;
      GEvent.addListener(markers[0], "mouseover", function () {markers[0].openInfoWindowHtml("アーデンホーム甲府<br>");});
      n_markers++;
      map.addOverlay(marker);
    }