function initialize() {
    var myOptions = {
      zoom: 18,
      center: new google.maps.LatLng(43.05887028453988, 141.3547432422638),
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    var map = new google.maps.Map(document.getElementById("gmap"),
                                  myOptions);

    var image = new google.maps.MarkerImage('../images/common/mark.jpg', new google.maps.Size(45,45));
    var myLatLng = new google.maps.LatLng(43.05887028453988, 141.3547432422638);
    var beachMarker = new google.maps.Marker({
        position: myLatLng,
        map: map,
        icon: image,
        title:"株式会社札幌プロパティ"
    });
    
    var infowindow = new google.maps.InfoWindow(
    { content: '<strong>株式会社札幌プロパティ</strong><br />〒060-0061<br />札幌市中央区南1条西2丁目5番地<br />南1条Kビル7F',
            size: new google.maps.Size(350, 200)
    });
    
    google.maps.event.addListener(beachMarker, 'click', function() {
    infowindow.open(map,beachMarker);
    });
    google.maps.event.trigger(beachMarker, 'click');
  }