Preciso de ajuda para exibir infowindow em múltiplos polygons neste codigo com google maps

I need help with infowindow for multiple polygons, I’m not doing it in java, does anyone qualify? BR Preciso de ajuda com infowindow para polygonos multiplos, não estou dando conta em java, alguém se habilita?

<?php include 'export_xml.php'; ?> Google Maps: Storing Polygons in database

function initialize() {
		  var mapOptions = {
			zoom: 14,
			center: new google.maps.LatLng(-22.247791, -53.348142),
			mapTypeId: google.maps.MapTypeId.ROADMAP
		  };

		  var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
		  var arr = new Array();
		  var polygons = [];
		  var bounds = new google.maps.LatLngBounds();
		  
		  
		  var xml = xmlParse(xmlString);
		  var subdivision = xml.getElementsByTagName("subdivision");
		  								  
		  for (var i = 0; i < subdivision.length; i++) {
			arr = [];
			html = [];
			var name = xml.documentElement.getElementsByTagName("subdivision")[i].getAttribute("name");
			var address = xml.documentElement.getElementsByTagName("subdivision")[i].getAttribute("address");
			var html = "<b>" + name + "</b> <br/>" + address + "<br><a href=# target=_blank>Clique aqui"; 				//Tentando pegar dados dos polygons individuais
			var coordinates = xml.documentElement.getElementsByTagName("subdivision")[i].getElementsByTagName("coord");
			for (var j = 0; j < coordinates.length; j++) {
			  arr.push(new google.maps.LatLng(
				parseFloat(coordinates[j].getAttribute("lat")),
				parseFloat(coordinates[j].getAttribute("lng"))
			  ));

			  bounds.extend(arr[arr.length - 1])
			}
			polygons.push(new google.maps.Polygon({
			  paths: arr,
			  title: html,
			  strokeColor: '#FF0000',
			  strokeOpacity: 0.8,
			  strokeWeight: 2,
			  fillColor: '#FF0000',
			  fillOpacity: 0.35
			  
			}));
			polygons[polygons.length - 1].setMap(map);
			
			var infowindow = new google.maps.InfoWindow({
				
			  content: html // Tentando pegar dados dos polygons individuais
			});
			
			google.maps.event.addListener(polygons[polygons.length - 1], 'click', function(event) {
				infowindow.open(map);
				infowindow.setPosition(event.latLng);
			});
			
		  }
		  
		  // });
		  map.fitBounds(bounds);
		}
		
		var xmlString = '<?php echo $textolinha; ?>';
		
		/**
		 * Parses the given XML string and returns the parsed document in a
		 * DOM data structure. This function will return an empty DOM node if
		 * XML parsing is not supported in this browser.
		 * @param {string} str XML string.
		 * @return {Element|Document} DOM.
		 */
		function xmlParse(str) {
		  if (typeof ActiveXObject != 'undefined' && typeof GetObject != 'undefined') {
			var doc = new ActiveXObject('Microsoft.XMLDOM');
			doc.loadXML(str);
			return doc;
		  }

		  if (typeof DOMParser != 'undefined') {
			return (new DOMParser()).parseFromString(str, 'text/xml');
		  }

		  return createElement('div', null);
		}

		google.maps.event.addDomListener(window, 'load', initialize);
		
    </script>
    <style>
        #map-canvas,
		body,
		html {
		  height: 100%;
		  width: 100%;
		}
		
    </style>
</head>
<body>
    
	<div id="map-canvas"></div>
</body>

Reply from export_xml.php: BR Saída do xml

<subdivisions>
	<subdivision name="test" address="0" >
		<coord lat="-22.246906181604235" lng="-53.343656079469014" />
		<coord lat="-22.246160343589366" lng="-53.34298025442864" />
		<coord lat="-22.246612168987966" lng="-53.34231238438393" />
		<coord lat="-22.24577306351632" lng="-53.34163110329415" />
		<coord lat="-22.246309297178513" lng="-53.34088544918801" />
		<coord lat="-22.24709286679633" lng="-53.34152917935158" />
		<coord lat="-22.247917069182467" lng="-53.342210460441365" />
		<coord lat="-22.24876923872473" lng="-53.34288149840766" />
		<coord lat="-22.248292595053044" lng="-53.343581554960544" />
		<coord lat="-22.247442990211773" lng="-53.34287048089961" />
	</subdivision>
	<subdivision name="test" address="0" >
		<coord lat="-22.24744605203327" lng="-53.3428707695716" />
		<coord lat="-22.24664667240292" lng="-53.34224581487113" />
		<coord lat="-22.24714566457059" lng="-53.341564533781344" />
		<coord lat="-22.247922698585814" lng="-53.342200217317874" />
	</subdivision>
</subdivisions>

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