How to disable Google Map scrolling on mobile devices

function initMap(){
    var isDraggable = $(document).width() > 480 ? true : false; // If document (your website) is wider than 480px, isDraggable = true, else isDraggable = false

    var mapOptions = {
        draggable: isDraggable,

        scrollwheel: false, // Prevent users to start zooming the map when scrolling down the page
        //... options options options
    };
}