function initMap() {
    map = new google.maps.Map(document.getElementById("map"), {
        center: { lat: 51.109990, lng: 17.053},
        zoom: 13
    });

    for (let i = 0; i < data.places.length; i++) {
        let position = data.places[i].location;
        let name = data.places[i].name;
        marker = new google.maps.Marker({
            map: map,
            position: position,
            title: name,
            animation: google.maps.Animation.DROP,
            id: i
        });
        markers.push(marker);
    }

    marker.click(function() {
        const menu =$("#menu");
        infoContent.appendTo(menu);
    });
}