var map;

function startup() {
  if (GBrowserIsCompatible()) {
    map = new GMap2(document.getElementById("MyMap"));
    map.setCenter(new GLatLng(36.3121555, 139.1825348), 14);
    map.addControl(new GSmallMapControl());
    map.addControl(new GScaleControl());
    map.addControl(new GMapTypeControl());
    map.addControl(new GOverviewMapControl());

    var mk=new GMarker(new GLatLng(36.3121555, 139.1825348));
    map.addOverlay(mk);
	GEvent.addListener(mk,"click",showInfo);


	function showInfo() {
	  var offset = new GSize(10, -20);
      mk.openInfoWindowHtml("チェルシーです！");
    }
  }
}


onload = startup;
onunload = GUnload;