window.onload = function() {
var map = new GMap2(document.getElementById("google_map"));
map.setCenter(new GLatLng(35.172650690899445, 136.89908176660538), 5,G_NORMAL_MAP);
map.setZoom(16);
map.addControl(new GLargeMapControl());
map.addControl(new GScaleControl());
map.enableContinuousZoom();
var gpObj = new GPoint(136.89908176660538, 35.172650690899445);
var marker = new GMarker(gpObj);
map.addOverlay(marker);
}