<script src="http://maps.googleapis.com/maps/api/js"></script>

// Load google map script
loadScript();

            // Change map
            ChangeMap(Branch.Latitude, Branch.Longitude);

        function loadScript() {
            var script = document.createElement("script");
            script.type = "text/javascript";
            script.src = "http://maps.googleapis.com/maps/api/js?key=&sensor=false&callback=initialize";
            document.body.appendChild(script);
        }

        function ChangeMap(latitude, longitude) {
            mapProp = {
                center: new google.maps.LatLng(latitude, longitude),
                zoom: 14,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            };
            map = new google.maps.Map(document.getElementById("googleMap"), mapProp);
        }

<div id="googleMap"></div>