function initialize4() {
 var myLatlng = new google.maps.LatLng(35.6052629,140.1212398);
 var myOptions = {
      zoom: 15,
      center: myLatlng,
      mapTypeId: google.maps.MapTypeId.ROADMAP,
			disableDefaultUI : true,
			navigationControl : true
    }
 var map = new google.maps.Map(document.getElementById("map_canvas4"), myOptions);
 var marker = new google.maps.Marker({
        position: myLatlng, 
        map: map,
        title:"株式会社ジーエムシー　千葉支社"
 });
 
//クリックすると出るフキダシ
var contentString = '<div class="mapAdC">〒260-0013<br />千葉県千葉市中央区中央<br />4-15-3　読売ビル3F<br />TEL:043-225-7100（代表）<br />株式会社ジーエムシー<br />千葉支社<p class="a-ct"><img src="images/mapicon.gif" alt="" width="61" height="61" /></p></div>';
var infowindow = new google.maps.InfoWindow({content: contentString});
google.maps.event.addListener(marker, 'click', function() {infowindow.open(map,marker);});
//クリックしなくても出るフキダシ
//google.maps.event.trigger(marker, 'click');
 }