谷歌地图Infowindow没有正确显示，但当我打开冷杉时，它运作良好

The infowindow is not showing properly on my map when clicking on a marker. The website is here.

You'll also notice the map control isn't properly displayed either.

var map;
var locations = <?php print json_encode(di_get_locations()); ?> ;
var markers = []
jQuery(function ($) {
    var options = {
        center: new google.maps.LatLng(51.840639771473, 5.8587418730469),
        zoom: 8,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };
    map = new google.maps.Map(document.getElementById("map_canvas"), options);

    for (var i = 0; i < locations.length; i++) {
        makeMarker(locations[i]);
    }
    centerMap();

});

function makeMarker(location) {
    var markerOptions = {
        map: map,
        position: new google.maps.LatLng(location.lat, location.lng)
    };
    var marker = new google.maps.Marker(markerOptions);
    markers.push(marker);
    var content = '';

    var infowindow = new google.maps.InfoWindow({
        content: "test",
        size: new google.maps.Size(50, 50),
        disableAutoPan: true
    });


    google.maps.event.addListener(marker, 'click', function (e) {
        infowindow.open(map, marker);
    });
}

function centerMap() {
    map.setCenter(markers[markers.length - 1].getPosition());
}