function initialize(lat, lng, shop_name) {
	if (GBrowserIsCompatible()) {
		var map = new GMap2(document.getElementById("map_canvas"));
		map.setCenter(new GLatLng(lat, lng), 16);
		map.addControl(new GLargeMapControl());
		var marker = new GMarker(new GLatLng(lat, lng));
		map.addOverlay(marker);
		GEvent.addListener(marker, 'click',
			function() {
				marker.openInfoWindowHtml("<b>マイトランク"+shop_name+"店</b>");
			}
		);
		GEvent.trigger(marker,"click");
	}
}