Codigo Ejemplo Google Maps

dependencias.html

<script src="/vendor/jquery/jquery.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyDaqJrcvUyHQlDrV6gASSUr3Fi39NRSJLg&amp;v=3.exp&amp;libraries=places"></script>
<script src="/views/establecimiento/index.min.js?undefined"></script>

index.js

setTimeout(function() {
    $('.gridtable').DataTable({});
    $("tr").click(function(index) {
        google.maps.event.trigger(marker[$(this).find("td").eq(0).text()], 'click');
    })
    var locations = JSON.parse($("#valor").attr("class"));
    var map = new google.maps.Map(document.getElementById('map'), {
        zoom: 16,
        center: new google.maps.LatLng(4.5514281, -75.6602994),
        mapTypeId: google.maps.MapTypeId.ROADMAP
    });
    var myCity = new google.maps.Circle({
        center: new google.maps.LatLng(4.5514281, -75.6602994),
        radius: 500,
        strokeColor: "#0000FF",
        strokeOpacity: 0.8,
        strokeWeight: 2,
        fillColor: "#0000FF",
        fillOpacity: 0.4
    });
    myCity.setMap(map);
    var infowindow = new google.maps.InfoWindow();
    for (i = 0; i < locations.length; i++) {
        var image = '';
        if (locations[i][4] !== null) {
            image = locations[i][4].split('<img src=')[1].split('>')[0];
        }
        marker[i] = new google.maps.Marker({
            position: new google.maps.LatLng(locations[i][1], locations[i][2]),
            label: i + '',
            animation: google.maps.Animation.DROP,
            icon: image,
            map: map
        });
        google.maps.event.addListener(marker[i], 'click', (function(marker, i) {
            return function() {
                var imagen = locations[i][4];
                var titulo = "<Label>" + locations[i][0] + "</label>";
                var textarea = "<textarea id='comentario' class='form-control'></textarea>";
                var boton = "<button type='submit' id='ing_msj' class='btn btn-large btn-primary form-control'>Comentar</button>";
                map.setCenter(marker.getPosition());
                infowindow.setContent("<div class='control-group'>" + imagen + titulo + "<br>" + textarea + "<br>" + boton + "</div>");
                infowindow.open(map, marker);
                $("#comentario").prop("placeholder", locations[i][5]);
                $("#ing_msj").click(function() {
                    var a = locations[i][6];
                    var b = $("#comentario").val();
                    ingresarComentario(a, b);
                });
            }
        })(marker[i], i));
    }
}, 1000)