How to use Google Maps without Internet connection in Intranet Website

Below is the Geo Map code I am using in my website. This code works if there is internet connection. If there is no internet connection, my code will not work. I want to make it work without internet connection. Please reply is there any solution for it??

<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/infobox/src/infobox.js"></script>

<script type="text/javascript">
    var google_markers = new Array();
    var markers = [
      <asp:Repeater ID="rptMarkers" runat="server">
    <ItemTemplate>
    {
        "title": '<%# Eval("StationName") %>',
        "lat": '<%# Eval("Latitude") %>',
        "lng": '<%# Eval("Longitude") %>',
        "state": '<%# Eval("State") %>',
        "type": 'No status'
    }
</ItemTemplate>
<SeparatorTemplate>
,
</SeparatorTemplate>
</asp:Repeater>
    ];
</script>

<script type="text/javascript">

    window.onload = function () {
        var mapOptions = {
            center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
            zoom: 9,
            mapTypeId: google.maps.MapTypeId.ROADMAP,
            streetViewControl: false,
            mapTypeControl: true
        };
        var boxText = document.createElement("div");
        var myOptions = {
            content: boxText
            , disableAutoPan: false
            , maxWidth: 0
            , pixelOffset: new google.maps.Size(-140, 0)
            , zIndex: null
            , infoBoxClearance: new google.maps.Size(1, 1)
            , isHidden: false
            , pane: "floatPane"
            , enableEventPropagation: false
        };

        //var infoWindow = new google.maps.InfoWindow();
        var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
        var ib = new InfoBox(myOptions);

        for (i = 0; i < markers.length; i++) {
            var data = markers[i]
            var myLatlng = new google.maps.LatLng(data.lat, data.lng);
            var icon = "";
            switch (data.type) {
                case "Danger":
                    icon = "red";
                    break;
                case "Normal":
                    icon = "green";
                    break;
                case "Warning":
                    icon = "yellow";
                    break;
                case "No status":
                    icon = "blue";
                    break;
            }
            var className = 'box ' + icon;
            icon = "http://maps.google.com/mapfiles/ms/icons/" + icon + ".png";

            var marker = new google.maps.Marker({
                position: myLatlng,
                map: map,
                title: data.title,
                animation: google.maps.Animation.DROP,
                icon: new google.maps.MarkerImage(icon),
                className: className,
                description: '<b>' + 'Station Name : ' + data.title +'</br>'+ 'State : ' + data.state 
            });
            (function (marker, data) {
                google.maps.event.addListener(marker, "mouseover", function (e) {
                    boxText.innerHTML = this.description;
                    boxText.className = this.className;
                    ib.open(map, this);
                });
            })(marker, data);
            google.maps.event.addListener(marker, 'mouseout', function (e) {
                ib.close();
            });
        }
    }
    
</script>   

Please reply