Using JSON POST Request

I'm attempting to use JSON to initiate a POST request to an API.

I've found some example code, and before I get too far I wanted to get that working, but I'm stuck...

<html>
<head>
<script type="text/javascript">
function JSONTest()
{
requestNumber = JSONRequest.post(
    "https://example.com/api/",
    {
        apikey: "23462",
        method: "example",
        ip: "208.74.35.5"
    },
    function (requestNumber, value, exception) {
        if (value) {
            processResponse(value);
        } else {
            processError(exception);
        }
    }
); 
}
</script>
</head>
<body>

<h1>My JSON Web Page</h1>


<button type="button" onclick="JSONTest()">JSON</button>

</body>
</html> 

This is a .html file, which I am running in chrome. Nothing happens when I click the button...

I think I'm missing a piece of javascript which interprets the JSON response and can be displayed? otherwise any other advice?