var maplace = new Maplace({
    map_div: '#mappanel',
    controls_type: 'dropdown',
    controls_title: 'Select a point:',
    controls_position: google.maps.ControlPosition.TOP_LEFT
});

function loadMap() {
    $.ajax({
        url: 'includes/ajax_getmap.php',
        type: 'POST',
        cache: false,
        timeout: 5000,
        data: { date: $('#dateselect').val() },
        dataType: 'json',
        success: function(data) {
            maplace.SetLocations(data.locations, true);
        },
        error: function(XMLHttpRequest, textStatus, errorThrown)  {
            alert(errorThrown)
        }
    });
}

{"locations":[
    {"lat":52.1,"lon":11.3,"title":"Title 1","html":"<h3>Content 1</h3>","zoom":8},
    {"lat":51.2,"lon":22.2,"title":"Title 2","html":"<h3>Content 2</h3>","zoom":8},
    {"lat":49.4,"lon":35.9,"title":"Title 3","html":"<h3>Content 3</h3>","zoom":8},
    {"lat":47.8,"lon":15.6,"title":"Title 4","html":"<h3>Content D2</h3>","zoom":8}
]}