 google.maps.event.addDomListener(window, 'load', init);

        function init() {
            var mapOptions = {
                zoom: 11,
                scrollwheel: false,
                mapTypeControl: false,
                zoomControl: false,
                scaleControl: false,
                streetViewControl: false,
                rotateControl: false,
                center: new google.maps.LatLng(23.810332, 90.41251809999994),
                styles: 

[
    {
        "featureType": "administrative",
        "elementType": "all",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    },
    {
        "featureType": "administrative",
        "elementType": "geometry.fill",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    },
    {
        "featureType": "administrative",
        "elementType": "geometry.stroke",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    },
    {
        "featureType": "administrative",
        "elementType": "labels.text",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    },
    {
        "featureType": "landscape",
        "elementType": "all",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    },
    {
        "featureType": "poi",
        "elementType": "all",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    },
    {
        "featureType": "road",
        "elementType": "all",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    },
    {
        "featureType": "transit",
        "elementType": "all",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    },
    {
        "featureType": "water",
        "elementType": "all",
        "stylers": [
            {
                "visibility": "on"
            }
        ]
    }
]


            };
            var mapElement = document.getElementById('maps');
            var map = new google.maps.Map(mapElement, mapOptions);
            var marker = new google.maps.Marker({
                position: new google.maps.LatLng(23.810332, 90.41251809999994),
                map: map,
                icon: 'images/map-marker.png'
            });
        }