Simplest Zebra Browser Print Example?

I have tried to simplify the DevDemo.js scripts for my purposes, but have not had any success. I am on an Internet Explorer 11 setup. The Zebra GK420d was successfully configured and works with the index.html sample. I try with the below function and nothing happens inside the BrowserPrint command:

<script type="text/javascript" src="js/jquery-1.11.1.min.js"></script>

<script type="text/javascript" src="js/BrowserPrint-1.0.4.min.js"></script>

<script type="text/javascript">

var format_start = "^XA^LL200^FO80,50^A0N36,36^FD";

var format_end = "^FS^XZ";

var txtToPrint = "Itza Miragul";

 

function printTest() {

    testPresent(); // Added function to attached BrowserPrint-1.0.4.min.js to test if script could see it. This alert pops. Remove this line to use original BrowserPrint-1.0.4.min.js instead of attached version.

    BrowserPrint.getDefaultDevice('printer', function(printer)

        {

            alert(printer.name); // This alert does not pop - why???

            printer.send(format_start + txtToPrint + format_end);

        },

        function(error_response)

        {

            // This alert doesn't pop either

            alert(    "An error occured while attempting to connect to your Zebra Printer. " +

                    "You may not have Zebra Browser Print installed, or it may not be running. " +

                    "Install Zebra Browser Print, or start the Zebra Browser Print Service, and try again.");

        }

    );

    alert("After BrowserPrint"); //This alert pops

}

</script>

I'm a novice to java so I probably managed to make some sort of syntax error, but I get no feedback about where it might be.

Any help would be greatly appreciated.

 

Best Regards,

 

Robert