function initialize() {
        var centerPos = new google.maps.LatLng(34.673607,135.818546);
        var mapOptions = {
          zoom : 15,
          center : centerPos,
          mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        var map = new google.maps.Map(document.getElementById("map_canvas1"), mapOptions);
        
        var markerOptions = {
          position : centerPos,
          map : map,
          title : "(社）奈良県宅地建物取引業協会",
		  icon : "img/marker_flag.png"
        };
        var marker = new google.maps.Marker(markerOptions);
      }
      window.onload = initialize;