function initialize() {

	var centerPos = new google.maps.LatLng(35.7955454, 139.7915349);
	var mapOptions = {
	  zoom : 15,
	  center : centerPos,
	  mapTypeId: google.maps.MapTypeId.ROADMAP,
	  streetViewControl: true,
	  scrollwheel: false,
	  mapTypeControl: false
	};
	var map = new google.maps.Map(document.getElementById("map_box"), mapOptions);
	var markerOptions = {
	  position : centerPos,
	  map : map
	};

	var marker = new google.maps.Marker(markerOptions);
	var infowindow = new google.maps.InfoWindow({
	    content: '<span style="color: #003399;font-weight:bold;letter-spacing:0;">レインボー</span><br /><span style="color: #000;">東京都足立区竹の塚6-15-9 <br />03-3858-7716</span>',
	    maxWidth: 403
	});

	google.maps.event.addListener(marker, 'click', function() {
	    infowindow.open(map,marker);
	});
	google.maps.event.trigger(marker, 'click');
}