var map;

function startUp() {
  map = new GMap2( document.getElementById("map") );
  map.setCenter( new GLatLng(35.172775,136.891377), 16);
  map.addControl(new GScaleControl());
  map.addControl(new GLargeMapControl());
  map.addControl(new GMapTypeControl());

  var mk = new GMarker( new GLatLng(35.172775,136.891377) );
  map.addOverlay(mk);
  GEvent.addListener( mk, "click", showInfo );

  function showInfo() {
  var offset = new GSize(30, -30)
    mk.openInfoWindowHtml( "柏森情報科学振興財団");
  }
}

onload   = startUp;
onunload = GUnload;