Show Multiple Markers on Google Map from JSON

map.js

jQuery(document).ready(function(){
	jQuery("#map").each(function(){
		SpotSearchMap = new SpotSearchMapObj(36.5626,136.362305, 8);
	});
});

var Marker;
var SpotSearchMap;
var SpotSearchMapObj = Class.create();
SpotSearchMapObj.prototype = {
	initialize: function(lat,lng,zoom){
		
		// 地図設定
		var latlng = new google.maps.LatLng(lat,lng);
		var myOptions = {
			zoom: zoom,
			center: latlng,
			mapTypeId: google.maps.MapTypeId.ROADMAP
	    };

		//地図の作成
		this.map = new google.maps.Map($('map'),myOptions);

		//マーカー表示
		this.spotSearch();
	},
	changeCenter: function(lat,lng){
		this.point = new google.maps.LatLng(lat,lng);
		this.map.panTo(this.point);
		Marker.setPosition(this.point);
	},
	panTo: function(point){
		this.map.panTo(point);
		Marker.setPosition(point);
	},
	addSpotMarker: function(title,link,image,lat,lng,date,time){
		var spoint = new google.maps.LatLng(lat,lng);
		var smarker = new google.maps.Marker({
			position: spoint,
			map: this.map,
			title: title,
			icon: '/img/marker.png'
		});
		var f = '<div style="width:200px;height:200px;"><a href="';
			f += link;
			f += '">';
			f += title;
			f += '</a><br /><a href="';
			f += link;
			f += '"><img src="';
			f += image;
			f += '" alt="';
			f += title;
			f += '" /></a><br />';
			f += date;
			f += '掲載 | ';
			f += time;
			f += '</div>';
		
		var infowindow = new google.maps.InfoWindow({
			content: f
		});
			
		// マーカークリック時にアクションウィンドウ表示
		google.maps.event.addListener(smarker, "click", function(){
			infowindow.open(this.map,smarker);
	 	});
		google.maps.event.addListener(infowindow, "position_changed", function(){
			infowindow.close();
	 	});
	},
	spotSearch: function(){
		jQuery.getJSON("getmap.php?format=json",function(json){
			if(json.items){
				for(i=0;i<json.items.length;i++){
					title = json.items[i].title;
					link = json.items[i].link;
					image = json.items[i].image;
					lat = json.items[i].geo.coordinates[0];
					lng = json.items[i].geo.coordinates[1];
					date = json.items[i].pubDate;
					time = json.items[i].time;
					SpotSearchMap.addSpotMarker(title,link,image,lat,lng,date,time);
				}
			}
		});
	}
}