Check internet connection on iOS app with Cordova Phonegap 3.3.0 not working

I have tried following this guide on Cordova docs, but it doesn't seem to work.

Here is my code:

I have added <plugin name="NetworkStatus" value="CDVConnection" /> to config.xml.

and this script to my index.html:

    <script type="text/javascript">


        document.addEventListener("deviceready", onDeviceReady, false);

        // device APIs are available
        //
        function onDeviceReady() {
            alert("1"); // runs this alert
            checkConnection();
        }

        function checkConnection() {
            var networkState = Connection.CELL;
            alert("2"); // doesn't run this

            var states = {};
            states[Connection.UNKNOWN]  = 'Unknown connection';
            states[Connection.ETHERNET] = 'Ethernet connection';
            states[Connection.WIFI]     = 'WiFi connection';
            states[Connection.CELL_2G]  = 'Cell 2G connection';
            states[Connection.CELL_3G]  = 'Cell 3G connection';
            states[Connection.CELL_4G]  = 'Cell 4G connection';
            states[Connection.CELL]     = 'Cell generic connection';
            states[Connection.NONE]     = 'No network connection';

            alert('Connection type: ' + states[networkState]);
        }

    </script>

var networkState = Connection.CELL; seems to cause the problem as it doesn't run the following alert, I have also tried navigator.connection.type but the same thing happened.

When I run the app in Chrome the console outputs the following error:

Uncaught ReferenceError: Connection is not defined 

Anybody know how to solve this problem?

Cheers