function startUp() {
	var map = new GMap2(document.getElementById("mymap"));
	map.setCenter(new GLatLng(35.69172245439275,139.74456757307053), 17);
	map.addControl(new GLargeMapControl());
	map.addControl(new GScaleControl());
	map.addControl(new GMapTypeControl());
	map.addControl(new GOverviewMapControl());

	var marker = new GMarker(new GLatLng(35.69172245439275,139.74456757307053));
	map.addOverlay(marker);
}

onload = startUp;
onunload = GUnload;