Inside CRM How to Use Bing Map Service (form onload) using javascript

Hello CRM Experts

I want to use Bing Map CRM inside CRM form I used to call the Service 

on CRM form I got "Microsoft" is Undefined error. Please suggest how can I do that ..  My code is like this

var where;


function PopulateGeocodes() {
    debugger;
    var type = Xrm.Page.ui.getFormType();
    crmStreet = Xrm.Page.data.entity.attributes.get("address1_line1").getValue();
    crmLatitude = Xrm.Page.data.entity.attributes.get("techno_latitude").getValue();
    crmLongitude = Xrm.Page.data.entity.attributes.get("techno_longitude").getValue();
    crmCity = Xrm.Page.data.entity.attributes.get("address1_city").getValue();
    crmState = Xrm.Page.data.entity.attributes.get("address1_stateorprovince").getValue();
    crmZip =Xrm.Page.data.entity.attributes.get("address1_postalcode").getValue();
    crmCountry = Xrm.Page.data.entity.attributes.get("address1_country").getValue();

    // check for form create or update 
    if (type != 1) {

        if (crmLatitude != null && crmLongitude != null) {
            where = crmStreet + ", " + crmCity + ", " + crmState + " " + crmZip;
            LoadSearchModule();
        }
        else {
            return;
        }
    }


}



function getMap() {
    map = new Microsoft.Maps.Map({ credentials: 'Aqg2XmIT10BlfDpHXvTkVTJGFGPBG8sH7CnP5aPukNRJv8Uaexv1XzB7c1Wo8qX-' });
}
function createSearchManager() {
    map.addComponent('searchManager', new Microsoft.Maps.Search.SearchManager(map));
    searchManager = map.getComponent('searchManager');
}
function LoadSearchModule() {
    Microsoft.Maps.loadModule('Microsoft.Maps.Search', { callback: geocodeRequest })
}
function geocodeRequest() {
    createSearchManager();
   // var where = 'Denver, CO';
    var userData = { name: 'Maps Test User', id: 'XYZ' };
    var request =
    {
        where: where,
        count: 5,
        bounds: map.getBounds(),
        callback: onGeocodeSuccess,
        errorCallback: onGeocodeFailed,
        userData: userData
    };
    searchManager.geocode(request);
}
function onGeocodeSuccess(result, userData) {

    if (result) {
        map.entities.clear();
        var topResult = result.results && result.results[0];
        if (topResult) {
            var pushpin = new Microsoft.Maps.Pushpin(topResult.location, null);
            map.setView({ center: topResult.location, zoom: 10 });
            map.entities.push(pushpin);
            Xrm.Page.data.entity.attributes.get("techno_latitude").setSubmitMode("always");
            Xrm.Page.data.entity.attributes.get("techno_longitude").setSubmitMode("always");
            Xrm.Page.getAttribute("techno_latitude").setValue(topResult.location.latitude);
            Xrm.Page.getAttribute("techno_longitude").setValue(topResult.location.longitude);
            
        }
    }
}

I am calling one function on form onload event but I got error please suggest how to do that.